Python菜鸟之路基础篇(二)

简单模块初识

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen

import sys

# Python全局环境变量路径
print(sys.path)

# 打印传递给脚本的第二个参数
print(sys.argv[2])

['/Users/crh/PycharmProjects/app', '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python35.zip', '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5', '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/plat-darwin', '/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/lib-dynload', '/usr/local/lib/python3.5/site-packages']
2

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen

import os
 
# 调用系统命令
os.system("df -h")

Filesystem      Size   Used  Avail Capacity  iused    ifree %iused  Mounted on
/dev/disk1     233Gi   80Gi  153Gi    35% 20947137 40038205   34%   /
devfs          181Ki  181Ki    0Bi   100%      626        0  100%   /dev
map -hosts       0Bi    0Bi    0Bi   100%        0        0  100%   /net
map auto_home    0Bi    0Bi    0Bi   100%        0        0  100%   /home

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen

import os
import sys

# 把用户传入的参数当做命令执行
os.system(''.join(sys.argv[1:]))

#!/usr/bin/env python3 
# python startup file 
import sys
import readline
import rlcompleter
import atexit
import os
# tab completion 
readline.parse_and_bind('tab: complete')
# history file 
histfile = os.path.join(os.environ['HOME'], '.pythonhistory')
try:
    readline.read_history_file(histfile)
except IOError:
    pass
atexit.register(readline.write_history_file, histfile)
del os, histfile, readline, rlcompleter

# linux and python3 on mac
import sys
import readline
import rlcompleter

if sys.platform == 'darwin' and sys.version_info[0] == 2:
    readline.parse_and_bind("bind ^I rl_complete")
else:
    readline.parse_and_bind("tab: complete")  

>>> import tab
[quote]>> import os
>>> os.
Display all 234 possibilities? (y or n) 
>>> os.sy
os.symlink(      os.sys           os.sysconf(      os.sysconf_names os.system(      
>>> os.sy
os.symlink(      os.sys           os.sysconf(      os.sysconf_names os.system(      
>>> os.sy

基础数据类型认识

2 是一个整数的例子。
长整数 不过是大一些的整数。
3.23和52.3E-4是浮点数的例子。E标记表示10的幂。在这里，52.3E-4表示52.3 * 10-4。
(-5+4j)和(2.3-4.6j)是复数的例子，其中-5,4为实数，j为虚数，数学中表示复数是什么？。

在32位机器上，整数的位数为32位，取值范围为-2[b]31～2[/b]31-1，即-2147483648～2147483647

在64位系统上，整数的位数为64位，取值范围为-2[b]63～2[/b]63-1，即-9223372036854775808～9223372036854775807

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen[/quote]

a = '3'
print(type(a))

b = int(a)
print(type(a))

跟C语言不同，Python的长整数没有指定位宽，即：Python没有限制长整数数值的大小，但实际上由于机器内存有限，我们使用的长整数数值不可能无限大。

注意，自从Python2.2起，如果整数发生溢出，Python会自动将整数数据转换为长整数，所以如今在长整数数据后面不加字母L也不会导致严重后果了。

>>> print(type(2[/b]63))

[quote]>> print(type(2**62))

浮点数用来处理实数，即带有小数的数字。类似于C语言中的double类型，占8个字节（64位），其中52位表示底，11位表示指数，剩下的一位表示符号。

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen[/quote]

a = 3
print(type(a))

b = float(a)

print(type(b), b)

 3.0

复数由实数部分和虚数部分组成，一般形式为x＋yj，其中的x是复数的实数部分，y是复数的虚数部分，这里的x和y都是实数。

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen

a = (3-4j).conjugate()

print(a)

print(type(a))

# 结果
(3+4j)

在Python的世界里面有一个叫布尔值的东西，其实就是 真或假 1 或 0，简单点就是True和False。
在其他的配置或者语言里面，我们都知道把某个东西打开需要把他调试为True，关闭则设置为False。
在Python里面也是一样True就代表为真，条件成立；False就代表为假，条件不成立；1代表为真，0
代表假。

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen

a, b = 1, 0

if a:
    print("a is True")
else:
    print("a is False")

if b:
    print("b is True")
else:
    print("b is False")
    
# 结果
a is True
b is False

Python中的字符串在C语言中体现为是一个字符数组，每次创建字符串时候需要在内存中开辟一块连续的空，并且一旦需要修改字符串的话，就需要再次开辟空间，万恶的+号每出现一次就会在内从中重新开辟一块空间。

name = "lucky"
print "i am %s " % name
  
#输出: i am lucky

def rstrip(self, [i]args, [/i]*kwargs): # real signature unknown
        """
        Strip trailing bytes contained in the argument.
        
        If the argument is omitted or None, strip trailing ASCII whitespace.
        """
        pass

msg = "  my name is lucky   "

print("[i][b][/i]" + msg.lstrip() + "[/b]*")

Result：
[i][b][/i]  my name is lucky[/b]*

def lstrip(self, chars=None): # real signature unknown; restored from __doc__
        """
        S.lstrip([chars]) -> str
        
        Return a copy of the string S with leading whitespace removed.
        If chars is given and not None, remove characters in chars instead.
        """
        return ""

msg = "  my name is lucky   "
info = "     game is\tlol\tover!"

print("[b][i]" + msg.lstrip() + "[/b][/i]")
print("[b][i]" + info.lstrip() + "[/b][/i]")

Result:
[b][i]my name is lucky   [/b][/i]
[b][i]game is	lol	over![/b][/i]

def strip(self, chars=None): # real signature unknown; restored from __doc__
        """
        S.strip([chars]) -> str
        
        Return a copy of the string S with leading and trailing
        whitespace removed.
        If chars is given and not None, remove characters in chars instead.
        """
        return ""

msg = "  ox\nB  "

print("[b][i]" + msg.strip() + "[/b][/i]")

Result:
***ox
B***

def splitlines(self, keepends=None): # real signature unknown; restored from __doc__
        """
        S.splitlines([keepends]) -> list of strings
        
        Return a list of the lines in S, breaking at line boundaries.
        Line breaks are not included in the resulting list unless keepends
        is given and true.
        """
        return 

msg = "niu\nbai"
print(msg.splitlines())

Result:
['niu', 'bai']

def rsplit(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__
        """
        S.rsplit(sep=None, maxsplit=-1) -> list of strings
        
        Return a list of the words in S, using sep as the
        delimiter string, starting at the end of the string and
        working to the front.  If maxsplit is given, at most maxsplit
        splits are done. If sep is not specified, any whitespace string
        is a separator.
        """
        return 

msg = "wo is wo wo tou wo is wo is lucky"
print(msg.rsplit('wo', 2))

Result:
['wo is wo wo tou ', ' is ', ' is lucky']

从0开始数，到第二个wo之后开始分隔。

def split(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__
        """
        S.split(sep=None, maxsplit=-1) -> list of strings
        
        Return a list of the words in S, using sep as the
        delimiter string.  If maxsplit is given, at most maxsplit
        splits are done. If sep is not specified or is None, any
        whitespace string is a separator and empty strings are
        removed from the result.
        """
        return 

msg = "1a2a3a4a5"
print(msg.split('a'))

Result：
['1', '2', '3', '4', '5']

def ljust(self, width, fillchar=None): # real signature unknown; restored from __doc__
        """
        S.ljust(width[, fillchar]) -> str
        
        Return S left-justified in a Unicode string of length width. Padding is
        done using the specified fill character (default is a space).
        """
        return ""

msg = "lucky"
print(msg.ljust(30, 'G'))

Result:
luckyGGGGGGGGGGGGGGGGGGGGGGGGG

def rjust(self, width, fillchar=None): # real signature unknown; restored from __doc__
        """
        S.rjust(width[, fillchar]) -> str
        
        Return S right-justified in a string of length width. Padding is
        done using the specified fill character (default is a space).
        """
        return ""

msg = "lucky"
print(msg.rjust(30, 'G'))

Result:
GGGGGGGGGGGGGGGGGGGGGGGGGlucky

def zfill(self, width): # real signature unknown; restored from __doc__
        """
        S.zfill(width) -> str
        
        Pad a numeric string S with zeros on the left, to fill a field
        of the specified width. The string S is never truncated.
        """
        return ""

msg = "lucky"
print(msg.zfill(30))

Result:
0000000000000000000000000lucky

def find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
        """
        S.find(sub[, start[, end]]) -> int
        
        Return the lowest index in S where substring sub is found,
        such that sub is contained within S[start:end].  Optional
        arguments start and end are interpreted as in slice notation.
        
        Return -1 on failure.
        """
        return 0

msg = "lucky.chen@126.com"
print(msg.find('c'))
print("[i]" [/i] 20)
print(msg.find('c', 3, 10))
print("[i]" [/i] 20)
print(msg.find('c', 8, 19))

Result:
2
********************
6
********************
15

def index(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
        """
        S.index(sub[, start[, end]]) -> int
        
        Like S.find() but raise ValueError when the substring is not found.
        """
        return 0

name = 'lucky'
print(name.index('u'))
print(name.index('c', 0, 4))

Result:
1
2

def rfind(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
        """
        S.rfind(sub[, start[, end]]) -> int
        
        Return the highest index in S where substring sub is found,
        such that sub is contained within S[start:end].  Optional
        arguments start and end are interpreted as in slice notation.
        
        Return -1 on failure.
        """
        return 0

msg = "lucky.chen@126.com"
print(msg.rfind('c'))
print("[i]" [/i] 10)
print(msg.rfind('c', 1, 6))


if msg.rfind('c', 22, 23) == -1:
    print("failure")
else:
    print("OK")
    
Result:
15
**********
2
failure

def rindex(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
        """
        S.rindex(sub[, start[, end]]) -> int
        
        Like S.rfind() but raise ValueError when the substring is not found.
        """
        return 0

msg = "lucky.chen@126.com"
print(msg.rindex('c'))
print("[i]" [/i] 10)
print(msg.rindex('c', 1, 6))

Result:
15
**********
2

def capitalize(self): # real signature unknown; restored from __doc__
        """
        S.capitalize() -> str
        
        Return a capitalized version of S, i.e. make the first character
        have upper case and the rest lower case.
        """
        return ""

msg = "lol"

print(msg.capitalize())

Result:
Lol

def islower(self): # real signature unknown; restored from __doc__
        """
        S.islower() -> bool
        
        Return True if all cased characters in S are lowercase and there is
        at least one cased character in S, False otherwise.
        """
        return False

msg = "lol"
print(msg.islower())
print("[i]" [/i] 10)
msg = "Wo I Lol"
print(msg.islower())

Result:
True
**********
False

def istitle(self): # real signature unknown; restored from __doc__
        """
        S.istitle() -> bool
        
        Return True if S is a titlecased string and there is at least one
        character in S, i.e. upper- and titlecase characters may only
        follow uncased characters and lowercase characters only cased ones.
        Return False otherwise.
        """
        return False

msg = "lol"
print(msg.istitle())
print("[i]" [/i] 10)
msg = "Wo I Lol"
print(msg.istitle())

Result:
False
**********
True

def isupper(self): # real signature unknown; restored from __doc__
        """
        S.isupper() -> bool
        
        Return True if all cased characters in S are uppercase and there is
        at least one cased character in S, False otherwise.
        """
        return False

msg = "12lol"
print(msg.isupper())
print("[i]" [/i] 10)
msg = "Wo I Lol"
print(msg.isupper())
print("[i]" [/i] 10)
msg = "12WINE"
print(msg.isupper())

Result:
False
**********
False
**********
True

def upper(self): # real signature unknown; restored from __doc__
        """
        S.upper() -> str
        
        Return a copy of S converted to uppercase.
        """
        return ""

msg = "12lol"
print(msg.upper())
msg = "  Lucky is Good!  "
print("[size=16]#" + msg.upper() + "[/size]#")

Result:
12LOL
[size=16]#  LUCKY IS GOOD!  [/size]#

def lower(self): # real signature unknown; restored from __doc__
        """
        S.lower() -> str
        
        Return a copy of the string S converted to lowercase.
        """
        return ""

msg = "12lol"
print(msg.lower())
msg = "  Lucky is Good!  "
print("[size=16]#" + msg.lower() + "[/size]#")

Result:
12lol
[size=16]#  lucky is good!  [/size]#

def swapcase(self): # real signature unknown; restored from __doc__
        """
        S.swapcase() -> str
        
        Return a copy of S with uppercase characters converted to lowercase
        and vice versa.
        """
        return ""

msg = "12lOl"
print(msg.swapcase())
msg = "  Lucky is Good!  "
print("[size=16]#" + msg.swapcase() + "[/size]#")

Result:
12LoL
[size=16]#  lUCKY IS gOOD!  [/size]#

def isalnum(self): # real signature unknown; restored from __doc__
        """
        S.isalnum() -> bool
        
        Return True if all characters in S are alphanumeric
        and there is at least one character in S, False otherwise.
        """
        return False

sb = "123xx^ff"
ub = "123meting"
u = "123"
b = "meting"

print(sb.isalnum())
print(ub.isalnum())
print(u.isalnum())
print(b.isalnum())

Result:
False
True
True
True

def isalpha(self): # real signature unknown; restored from __doc__
        """
        S.isalpha() -> bool
        
        Return True if all characters in S are alphabetic
        and there is at least one character in S, False otherwise.
        """
        return False

ub = "123meting"
u = "123"
b = "meting"

print(ub.isalpha())
print(u.isalpha())
print(b.isalpha())

Result:
False
False
True

def isdigit(self): # real signature unknown; restored from __doc__
        """
        S.isdigit() -> bool
        
        Return True if all characters in S are digits
        and there is at least one character in S, False otherwise.
        """
        return False

ub = "123meting"
u = "123"
b = "123.0"

print(ub.isdigit())
print(u.isdigit())
print(b.isdigit())

Result:
False
True
False

def isidentifier(self): # real signature unknown; restored from __doc__
        """
        S.isidentifier() -> bool
        
        Return True if S is a valid identifier according
        to the language definition.
        
        Use keyword.iskeyword() to test for reserved identifiers
        such as "def" and "class".
        """
        return False

ub = "123meting"
u = "Fun"
b = "123.0"

print(ub.isidentifier())
print(u.isidentifier())
print(b.isidentifier())

Result:
False
True
False

def isnumeric(self): # real signature unknown; restored from __doc__
        """
        S.isnumeric() -> bool
        
        Return True if there are only numeric characters in S,
        False otherwise.
        """
        return False

ub = "123meting"
u = "123.0"
b = "123"

print(ub.isnumeric())
print(u.isnumeric())
print(b.isnumeric())

Result：
False
False
True

def isprintable(self): # real signature unknown; restored from __doc__
        """
        S.isprintable() -> bool
        
        Return True if all characters in S are considered
        printable in repr() or S is empty, False otherwise.
        """
        return False

msg = "Lucky is Good\t Man"

if msg.isprintable():
    print(msg)
else:
    print("have 制表符")
    
Result：
have 制表符

def isspace(self): # real signature unknown; restored from __doc__
        """
        S.isspace() -> bool
        
        Return True if all characters in S are whitespace
        and there is at least one character in S, False otherwise.
        """
        return False

msg = " "   # 一个空格
if msg.isspace():
    print("是空格")
else:
    print("不是空格")

msg = "   "   # 三个空格
if msg.isspace():
    print("是空格")
else:
    print("不是空格")
    
Result:
是空格
是空格

def count(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
        """
        S.count(sub[, start[, end]]) -> int
        
        Return the number of non-overlapping occurrences of substring sub in
        string S[start:end].  Optional arguments start and end are
        interpreted as in slice notation.
        """
        return 0

msg = "lucky.chen@126.com"
print(msg.count('c'))
print("[i]" [/i] 10)
print(msg.count('c', 3, 8))

Result:
3
**********
1

def center(self, width, fillchar=None): # real signature unknown; restored from __doc__
        """
        S.center(width[, fillchar]) -> str
        
        Return S centered in a string of length width. Padding is
        done using the specified fill character (default is a space)
        """
        return ""

msg = "Shopping List"
print(msg.center(50, '*'))

Result:
**************[i][b][/i]Shopping List[/b]*****************

def encode(self, encoding='utf-8', errors='strict'): # real signature unknown; restored from __doc__
        """
        S.encode(encoding='utf-8', errors='strict') -> bytes
        
        Encode S using the codec registered for encoding. Default encoding
        is 'utf-8'. errors may be given to set a different error
        handling scheme. Default is 'strict' meaning that encoding errors raise
        a UnicodeEncodeError. Other possible values are 'ignore', 'replace' and
        'xmlcharrefreplace' as well as any other name registered with
        codecs.register_error that can handle UnicodeEncodeErrors.
        """
        return b""

msg = "葫芦娃"
print(msg.encode(encoding='utf-8', errors='strict'))

Result:
b'\xe8\x91\xab\xe8\x8a\xa6\xe5\xa8\x83'

def endswith(self, suffix, start=None, end=None): # real signature unknown; restored from __doc__
        """
        S.endswith(suffix[, start[, end]]) -> bool
        
        Return True if S ends with the specified suffix, False otherwise.
        With optional start, test S beginning at that position.
        With optional end, stop comparing S at that position.
        suffix can also be a tuple of strings to try.
        """
        return False

msg = "lucky.chen@126.com"

if msg.endswith('126.com'):
    print("Mail is True")
else:
    print("Mail is False")

if msg.endswith('@', 8, 11):
    print(msg.find('@', 8, 11))
    
Result:
Mail is True
10

def expandtabs(self, tabsize=8): # real signature unknown; restored from __doc__
        """
        S.expandtabs(tabsize=8) -> str
        
        Return a copy of S where all tab characters are expanded using spaces.
        If tabsize is not given, a tab size of 8 characters is assumed.
        """
        return ""

msg = "Lol is\tGood Game"
print(msg.expandtabs())
print(msg.expandtabs(tabsize=1))
print(msg.expandtabs(tabsize=20))

Result:
Lol is  Good Game
Lol is Good Game
Lol is              Good Game

def format([i]args, [/i]*kwargs): # known special case of str.format
        """
        S.format([i]args, [/i]*kwargs) -> str
        
        Return a formatted version of S, using substitutions from args and kwargs.
        The substitutions are identified by braces ('{' and '}').
        """
        pass

msg = """**********[i][b][/i] Shopping List [/b]*************
book: {Book}
bike: {Bike}
food: {Food} """

print(msg.format(Book=1, Bike=2, Food=3))

print("#" * 50)

msg = """**********[i][b][/i] Shopping List [/b]*************
book: {0}
bike: {1}
food: {1} """

print(msg.format(100, 200))

Result:
**********[i][b][/i] Shopping List [/b]*************
book: 1
bike: 2
food: 3 
###############################################[size=16]#[/size]
**********[i][b][/i] Shopping List [/b]*************
book: 100
bike: 200
food: 200 

def format_map(self, mapping): # real signature unknown; restored from __doc__
        """
        S.format_map(mapping) -> str
        
        Return a formatted version of S, using substitutions from mapping.
        The substitutions are identified by braces ('{' and '}').
        """
        return ""

msg = """**********[i][b][/i] Shopping List [/b]*************
book: {Book}
bike: {Bike}
food: {Food} """

print(msg.format_map({'Book': 38, 'Bike': 800, 'Food': 1000}))

Result:
**********[i][b][/i] Shopping List [/b]*************
book: 38
bike: 800
food: 1000 

def join(self, iterable): # real signature unknown; restored from __doc__
        """
        S.join(iterable) -> str
        
        Return a string which is the concatenation of the strings in the
        iterable.  The separator between elements is S.
        """
        return ""

a = ['1', '2', '3', '4']  # 元素必须要是str类型
print(':'.join(a))

Result:
1:2:3:4

def maketrans(self, [i]args, [/i]*kwargs): # real signature unknown
        """
        Return a translation table usable for str.translate().
        
        If there is only one argument, it must be a dictionary mapping Unicode
        ordinals (integers) or characters to Unicode ordinals, strings or None.
        Character keys will be then converted to ordinals.
        If there are two arguments, they must be strings of equal length, and
        in the resulting dictionary, each character in x will be mapped to the
        character at the same position in y. If there is a third argument, it
        must be a string, whose characters will be mapped to None in the result.
        """
        pass

s = "Hello World!"
#加密
p = s.maketrans("abcdefg", "3!@#$%^")

print(p)

# 解密,打出真实的p的内容
print(s.translate(p))

Result：
{97: 51, 98: 33, 99: 64, 100: 35, 101: 36, 102: 37, 103: 94}
H$llo Worl#!

def replace(self, old, new, count=None): # real signature unknown; restored from __doc__
        """
        S.replace(old, new[, count]) -> str
        
        Return a copy of S with all occurrences of substring
        old replaced by new.  If the optional argument count is
        given, only the first count occurrences are replaced.
        """
        return ""

msg = 'abcbcacba'

print(msg.replace('a', 'w'))
print(msg.replace('a','c', 3))

Result:
wbcbcwcbw
cbcbcccbc

def startswith(self, prefix, start=None, end=None): # real signature unknown; restored from __doc__
        """
        S.startswith(prefix[, start[, end]]) -> bool
        
        Return True if S starts with the specified prefix, False otherwise.
        With optional start, test S beginning at that position.
        With optional end, stop comparing S at that position.
        prefix can also be a tuple of strings to try.
        """
        return False

msg = "lucky"

print(msg.startswith('l'))
print(msg.startswith('c', 2, 4))

Result:
True
True

def title(self): # real signature unknown; restored from __doc__
        """
        S.title() -> str
        
        Return a titlecased version of S, i.e. words start with title case
        characters, all remaining cased characters have lower case.
        """
        return ""

msg = " shopping list "
print(msg.title())

Result:
 Shopping List 

def translate(self, table): # real signature unknown; restored from __doc__
        """
        S.translate(table) -> str
        
        Return a copy of the string S in which each character has been mapped
        through the given translation table. The table must implement
        lookup/indexing via __getitem__, for instance a dictionary or list,
        mapping Unicode ordinals to Unicode ordinals, strings, or None. If
        this operation raises LookupError, the character is left untouched.
        Characters mapped to None are deleted.
        """
        return ""

name = "lucky"
f = name.maketrans('abcde', '12345')

# 加密文
print(f)

# 解密,明文
print('test'.translate(f))

Result：
{97: 49, 98: 50, 99: 51, 100: 52, 101: 53}
t5st

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen

msg = "康师傅"

print(msg.encode("utf-8"))  # 如果不指定编码格式，默认为utf-8
# b'\xe5\xba\xb7\xe5\xb8\x88\xe5\x82\x85'

print(b'\xe5\xba\xb7\xe5\xb8\x88\xe5\x82\x85'.decode("utf-8"))
# 康师傅

数据运算

#!/usr/bin/python
  
a = 60            # 60 = 0011 1100
b = 13            # 13 = 0000 1101
c = 0
  
c = a & b;        # 12 = 0000 1100
print "Line 1 - Value of c is ", c
  
c = a | b;        # 61 = 0011 1101
print "Line 2 - Value of c is ", c
  
c = a ^ b;        # 49 = 0011 0001
print "Line 3 - Value of c is ", c
  
c = ~a;           # -61 = 1100 0011
print "Line 4 - Value of c is ", c
  
c = a << 2;       # 240 = 1111 0000
print "Line 5 - Value of c is ", c
  
c = a >> 2;       # 15 = 0000 1111
print "Line 6 - Value of c is ", c

result = 值1 if 条件 else 值2

#!/usr/bin/env python3
# _[i]_coding:utf-8_[/i]_
# Author: Lucky.chen

a, b, c = 1, 2, 3

d = a if a > b else c
# 如果a大于b 则把的值赋给d, 如果a不大于b, 则把c的值直接赋给d
print(d)

Result:
3