python基础方法

一、忽略大小写相等upper(),lower()

 def cmp(str1,str2):
     return str1.upper()==str2.upper()

 list1 = 'MAC'
 list2 = 'mac'
 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

 def PrintInfo(a,*b):
     print(a)
     for i in b:
         print(i)
 PrintInfo(10)
 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

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

五、字典的遍历items()

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

六、遍历多个序列zip()

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

更多内容后续遇到了再慢慢补全

七、random()的用法；

使用random()函数自动生成电话号码，生成一个0-99999999的数，自动不足8位

 import random

 list = ''
 print(list+str(random.randint(0,99999999)).zfill(8))

感觉这种方法不对，应该是每一位都是由0-9 random得出

 import random
 preftree = ''
 for i in range(8):
     a = str(random.randint(0,9))
     preftree += a
 print(preftree)

=========

 import random

 list = random.sample(range(10),8)　　#随机生成8位10以内的数
 str1 = '132'
 print([str1+str(i) for i in list])