Learn to write: Python primitive string operator && string built-in function

Primitive string Operators

(1) Primitive string operators are designed to deal with special characters that appear in a string

(2) in the original string, all characters are used directly in the literal sense, and no special or non-printable characters are escaped.

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(3) For example, when Windows writes a path, the following conditions are often

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2. String built-in functions

(1) The original value of the string is not changed each time

(2) String. Function or assign a string to a function and write a variable name. functions are all possible.

(3) There are a lot of connotation functions, below is just an example to illustrate

>>> Import Tab
>>> hi = "I love You"
>>> hi.capitalize ()
' I Love You '
>>> Hi.rjust (30)
' I love you '
>>> Hi.ljust (30)
' I love you '
>>> Hi.center (30)
' I love you '
>>> Hi.center (30, "+")
' ++++++++++i Love you++++++++++ '
>>> Hi.count ("I")
1
>>> Hi.count ("I", 6)
0
>>> Hi.endswith ("U")
True
>>> Hi.startswith ("U")
False
>>> Hi.islower ()
True
>>> "zhang123". Islower ()
True
>>> Hi.isupper ()
False
>>> Hi.upper ()
' I Love You '
>>> Hi.lower ()
' I love you '

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>>> astr = "I love you \ t \ n"
>>> Astr.strip ()
' I love you '
>>> Astr.lstrip ()
' I love you \ t \ n '
>>> Astr.rstrip ()
' I love you '
>>> Astr.rstrip ("You")
' I love you \ t \ n '
>>> Astr.rstrip ("\n\tyou")
' I love '
>>> Astr.strip ("You")
' I love you \ t \ n '

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>>> Hi.split ()
[' I ', ' love ', ' You ']
>>> "home.tar.gz". Split (".")
[' Home ', ' tar ', ' GZ ']
>>> astr = "" "I
... love
... you "" ""
>>> Astr.split ()
[' I ', ' love ', ' You ']
>>> Astr.splitlines ()
[' I ', ' love ', ' You ']

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>>> hi.replace ("I", "You")
' You love '
>>> hi.replace ("O", "AAA", 1)
' I laaave you '

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This article is from the "Court of the Odd Tree" blog, please be sure to keep this source http://zhangdl.blog.51cto.com/11050780/1829568

Learn to write: Python primitive string operator && string built-in function