35 lines
1.5 KiB
Markdown
35 lines
1.5 KiB
Markdown
---
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title: The Python Strings
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---
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Python allows `str` objects, or _strings_, to be expressed in a few different ways:
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* Single quotes: `'Single quote strings can have "double" quotes inside.'`
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* Double quotes: `"Double quote strings can have 'single' quotes inside."`
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* Triple quoted:
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"""Triple quoted strings can span multiple lines.
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Unescaped "double" and 'single' quotes in triple quoted strings are retained."""
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'''Triple quoted strings can be 'single'or "double" quotes.
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Unescaped newlines are also retained.'''
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* Immutable: You cannot directly edit/change a Python string after you have created it. For example, if you try to directly reassign/change the first letter in a string, an error is thrown.
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>>> foo = "my string"
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>>> foo[0] = "a"
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Traceback (most recent call last):
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File "<stdin>", line 1, in <module>
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TypeError: 'str' object does not support item assignment
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Instead, you can convert the string into a list, modify the list element (string character) you wish to change, and then join the list elements back to a string, like so:
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>>> foo = "my string"
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>>> foo_list_form = list(foo)
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>>> foo_list_form[0] = "a"
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>>> foo = ' '.join(foo_list_form)
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>>> print(foo)
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ay string # The required output
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## Reference:
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<a href='https://docs.python.org/3/library/stdtypes.html#text-sequence-type-str' target='_blank' rel='nofollow'>Text Sequence Type _str_</a>
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