May 10, 2021 Python2
In python, a string becomes a powerful set of processing tools, and he is imm changed, that is, the string contains the order of characters and characters, which he cannot modify in place
Strings are the slightly larger categories of objects that we need to learn later -- the first representation of the sequence
The following list applies to the operation of the sequence as much as the metagroup, as described in the string section
Some of the operations and functions commonly used by strings
| Operation | Explain |
|---|---|
| s='' | An empty string |
| s="abc'd" | Double quotes are the same as single quotes |
| s='abc\n' | Escape sequence, using variables to display characters completely, only using the print function can display escape |
| s="""aaaaa""" | Triple quote string block |
| s=r'\temp\spam' | Raw string |
| s=b'abc' | The byte string of python 3.x |
| s=u'bac' | Unicode string |
| s1+s2 | Merge |
| s*3 | Repeat |
| s[i] | Index |
| s[i:j] | Sharding |
| len(s) | Find the length |
| “a %s parrot” % kind | The string formats the expression |
| "a {0} parrot".format(kind) | The string formatting method |
| s.find('xxx') | Search |
| s.rstrip() | Remove spaces |
| s.replace('xxx','xxx') | Replace |
| s.endswith('xxx') | Ends with xxx |
| 'xxx'.join(strlist) | Access separator |
| s.encode('latin-1') | Change the code |
| for x in s:print(x) | Iteration |
| ‘xxx’ in s | Membership |
| [c*2 for c in s] | Membership |
| map(ord,s) | Membership |