零基础入门学习Python 0~4课

872370398

1        No variable claim needed. Variable does not have type
2        "Tab is the key to control syntax. Need to be handle carefully.  A line with tab or no tab determine the logic level of that command.
Tab is just like the"" {"" in C.
if there is "":"" at the end of one command, then [Enter], the next line will start with a tab. E.g  if:, the next line is a tab behind if"
3        Tab can be used to promote command.  Type pr+tab, shows a list of all commands start with pr
4        IDLE is like cmd for windows, get direct input of command and execute
5        To compose a programe, use Ctrl+N (Create  New Window) and type in it and save.  With the file open, F5 can run it.
        Seems no programe name need to be given for now
6        "=" mean pass value (赋值) from right side to left side; "==" means "等号判断"
7        BIF means Built in Function(“内置函数”)
        In IDLE, type: dir(__builtins__), it will list all Built ins in Python. Among the output list, the word in small letters,eg print, are BIF
        use BIF help to get the help for BIF.  E.g  help(print)
8        \n, meaning start with a new line.  \ can also used to escape other conflict characters. Such as 'Let\'s talk to her'
9        In long paragraph, can use """ ……""" , within it, use [Enter], it will automatically apply \n for it.

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872370398

中国人