Join and split functions in Python

One is the split, the other is the connection.

Convention, see the internal help document first

Help on Method_descriptor:join (...)    S.join (iterable), String        Return a string which is the concatenation of the strings in the Iterable    .  The separator between elements is S. (END)

The iterated object (which should contain the STR type or error) is concatenated, and the return value is str, as follows:

In [2]: s = [' Hello ', ' World ']in [3]: ' _ '. Join (s)                                                                                                                                                     out[3]: ' Hello_world ' in [4]: ". Join (s) out[4]: ' HelloWorld ' in [5]: ' && '. Join (s) out[5]: ' Hello&&world ' in [6]: ' _ '. Join ((1, 2, 3))                                                                                                                                             ---------------------------------- -----------------------------------------TypeError                                 Traceback (most recent) < Ipython-input-6-48e56abfc814> in <module> ()----> 1 ' _ '. Join ((1, 2, 3) typeerror:sequence Item 0:expected St ring, int found

Look again at the Split function:

Help on Method_descriptor:split (...)    S.split ([Sep [, Maxsplit]]), List of strings        Return A list of the words in the string S, using Sep as the    Deli Miter string.  If Maxsplit is given, at most maxsplit    splits be done. If Sep is no specified or is None, any    whitespace string is a separator and empty strings be removed from the    re Sult. (END)

The string is split, the space or null character is removed, the return value is a list of STR, the second parameter is the number of splits, and is used as follows:

In [9]: s = ' life was short, I use Python ' In [ten]: S.spls.split s.splitlines in [ten]: S.split () out[10]: [' Life ' , ' is ', ' short, ', ' I ', ' use ', ' Python ']in [all]: S.split (', ') out[11]: [' Life was short ', ' I use Python ']in []: S.split (', ' or '. ')                                                                                                                                                OUT[12]: [' Life was short ', ' I use Python ']in []: S.split (', ', 3) OUT[13]: [' Life was short ', ' I us                                                                                                                                                e Python ']in []: S.split (', ', 5) OUT[14]: [' Life was short ', ' I use Python ']in []: s = ' Hello, wo Rld.                                                                                                        Life was short, I use Python '        in [+]: s.split (', ', 5) out[16]: [' Hello ', ' world. Life was short ', ' I use Python ']in [+]: s.split (', ', 2) out[17]: [' Hello ', ' world. Life was short ', ' I use Python ']in [+]: s.split (', ', 1) out[18]: [' Hello ', ' world. Life was short, I use Python ']in [+]: s.split (', ' or '. ', 2) out[19]: [' Hello ', ' world. Life was short ', ' I use Python ']

　　

　　

　

　　

Join and split functions in Python