python基础方法

一、忽略大小写相等upper(),lower()

1 def cmp(str1,str2):
2     return str1.upper()==str2.upper()
3 
4 list1 = 'MAC'
5 list2 = 'mac'
6 print(cmp(list1,list2))

二、strip() 去掉前后空格

list1 = '    MAC        ','    ma c'
print([list.strip() for list in list1])

三、不确定要穿几个参数时

1 def PrintInfo(a,*b):
2     print(a)
3     for i in b:
4         print(i)
5 PrintInfo(10)
6 PrintInfo(10,20,30)

四、行和列转换，（不一定正确）需要根据行、列数量来修改

1 matrix = [[1, 2, 3, 4],[5, 6, 7, 8],[9, 10, 11, 12]]
2 list = []
3 for i in range(len(matrix[1])):
4     list.append([row[i] for row in  matrix])
5 print(list)

五、字典的遍历items()

1 knights = {'gallahad': 'the pure', 'robin': 'the brave'}
2 for k, v in knights.items():
3     print(k, v)

六、遍历多个序列zip()

1 mx = [1, 2, 3, 4]
2 mt = [5, 6, 7, 8]
3 ma = [9, 10, 11, 12]
4 list = []
5 for i,j,n in zip(mx,mt,ma):
6     list.append([i,j,n])
7 print(list)

更多内容后续遇到了再慢慢补全