pythonfor循环中遍历的类型_python 学习之数据类型和for循环

classstr(object):"""str(object='') -> str
str(bytes_or_buffer[, encoding[, errors]]) -> str
Create a new string object from the given object. If encoding or
errors is specified, then the object must expose a data buffer
that will be decoded using the given encoding and error handler.
Otherwise, returns the result of object.__str__() (if defined)
or repr(object).
encoding defaults to sys.getdefaultencoding().
errors defaults to 'strict'."""
def capitalize(self): #real signature unknown; restored from __doc__
"""#将字符串首字母小写改大写
S.capitalize() -> str
Return a capitalized version of S, i.e. make the first character
have upper case and the rest lower case."""
return ""
def casefold(self): #real signature unknown; restored from __doc__
"""S.casefold() -> str
Return a version of S suitable for caseless comparisons."""
return ""
def center(self, width, fillchar=None): #real signature unknown; restored from __doc__
"""可以为字符串填充自定字符长度=字符+指定字符
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 ""
def count(self, sub, start=None, end=None): #real signature unknown; restored from __doc__
"""下面是详细参数：
子串：是要搜索的子串。
开始：从该指数开始搜索。第一个字符从索引0开始。通过默认搜索引擎从索引0开始。
结束：搜索从该指数结束。第一个字符从索引0开始。默认情况下，搜索结束，在最后一个索引。
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."""
return0def encode(self, encoding='utf-8', errors='strict'): #real signature unknown; restored from __doc__
"""编码上面有介绍
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""
def endswith(self, suffix, start=None, end=None): #real signature unknown; restored from __doc__
"""以某个字符结束
suffix -- 该参数可以是一个字符串或者是一个元素。
start -- 字符串中的开始位置。
end -- 字符中结束位置。
返回值
如果字符串含有指定的后缀返回True，否则返回False。
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."""
returnFalsedef expandtabs(self, tabsize=8): #real signature unknown; restored from __doc__
"""把tab转换成空格
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 ""
def find(self, sub, start=None, end=None): #real signature unknown; restored from __doc__
"""find(str, pos_start, pos_end)
解释：
str:被查找“字串”
pos_start:查找的首字母位置（从0开始计数。默认：0）
pos_end: 查找的末尾位置（默认-1）
返回值：如果查到：返回查找的第一个出现的位置。否则，返回-1。
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."""
return0def format(*args, **kwargs): #known special case of str.format
"""占位符类似变量引用
s = "print hell {0} ,age {1}"
print(s.format('alex',19))
S.format(*args, **kwargs) -> str
Return a formatted version of S, using substitutions from args and kwargs.
The substitutions are identified by braces ('{' and '}')."""
pass
def format_map(self, mapping): #real signature unknown; restored from __doc__
""&

pythonfor循环中遍历的类型_python 学习之数据类型和for循环

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