tab 自動補齊
alt+P 前一個命令
alt +N 下一個命令
""" """ 三重引號為注釋(也可以用單引號)
# 改行后面的都為注釋
查看Python模塊的位置
>>> import sys
>>> sys.path
['E:\\Python34\\Lib\\idlelib', 'C:\\Windows\\system32\\python34.zip', 'E:\\Python34\\DLLs', 'E:\\Python34\\lib', 'E:\\Python34', 'E:\\Python34\\lib\\site-packages']
import 模塊
模塊名.函數名(數據)
數據.函數()
dir(__builtins__) 查看pyton內置函數
help(input) 看input()用法
數據的添加和刪除
>>> movies=["The holy grail","the life of brian","the meaning of life"]
append(),pop()用於增加或者刪除末尾的數據
extend()用於在列表后面加一個數據項集合
remove()刪除一個特定的數據項
insert()在某個具體的位置加上數據
>>> movies.append("wo de ")
>>> print(movies)
['The holy grail', 'the life of brian', 'the meaning of life', 'wo de ']
>>> movies.pop()
'wo de '
>>> print(movies)
['The holy grail', 'the life of brian', 'the meaning of life']
>>> movies.extend(["gillima","chapam"])
>>> print(movies)
['The holy grail', 'the life of brian', 'the meaning of life', 'gillima', 'chapam']
>>> movies.remove("chapam")
>>> print(movies)
['The holy grail', 'the life of brian', 'the meaning of life', 'gillima']
>>> movies.insert(0,"1")
>>> print(movies)
['1', 'The holy grail', 'the life of brian', 'the meaning of life', 'gillima']
>
len處理列表時候表示列表元素的個數,處理元素的時候表示元素的字符個數。
>>> for num in range(4):
print(num)
0
1
2
3
#這個里面是不好4的。
(role, line_spoken) = each_line.split(':', 1)
line_spoken = line_spoken.strip()
#strip(去掉開頭和結尾處的空白符,\n,\r, \t)
(mins, secs) = time_string.split(splitter)
return(mins + '.' + secs)
#注意上面的+用來連接兩部分
if '-' in time_string:
splitter = '-'
#注意in的作用
set() #工廠函數,用於去掉重復的部分,沒有重復的數據叫集合。