Python learning (2)---Strings

Strings can be identified by single quotes ('...') or double quotes ("..."). \ can be used to escape quotes;

Case 1: If in the string has only single quotes but no double quotes, use double quotes, otherwise use single quotes Quote in quotation marks.

                                                                                                       "yes",he said' ",he said >>>"\"yes\",he said "

Case 2: The character

with \ in front of

is regarded as What to do with special characters?

Add an r

>>>print 'c:\some\name'c:\some
ame

before the first quotation mark. In the example \n is treated as a newline symbol, then Add r before the first quotation mark:

>>>print r'c:\some\name'c:\some\name

Scenario 3: What should I do if I want to split the string into multiple lines? Use "" "...""" or '''...'''

>>> print 'apple\nbanana'apple
banana>>> print '''apple
banana'''apple
banana>>> print """apple
banana"""apple
banana>>>

Case 4: How to concatenate multiple strings in Together??

(1) You can use + (variable + string text is also applicable)

>>> 'app' + 'le''apple'

(2) Adjacent ones are automatically connected together (Applicable when both are string literals)

>>> 'apple''love''banana''applelovebanana'>>>

Case 5: How is the string intercepted (retrieved)? Use subscript

>>> word = 'python'>>> word[0]'p'>>> word[1]'y'>>> word[-1]'n'>>> word[0:2]'py'>>> word[:2]+word[2:]'python'>>> len(word)6
>>>

Scenario 6: I want to change a character in the string, what should I do?

Word[1] = 'a' This doesn't work!! !

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