python中在不同类型数据转换方面是有标准库的,使用非常方便。但是在开发中,经常在list中字符转成整形的数据方便遇到问题。这里就记录一下常用的几种方法。
方法一:最基本的方法:通过轮训整个list来实现转换,具体代码如下:
# Python3 code to demonstrate # converting list of strings to int # using naive method test_list=['1','3','2','6','8'] print("Original list is: " + str(test_list)) out_list=test_list for i in range(0,len(test_list)): out_list[i]=int(test_list[i]) print("Out list is: " + str(out_list))
方法二:使用list的复合运算:
# Python3 code to demonstrate # converting list of strings to int # using list comprehension test_list=['1','3','2','6','8'] print("Original list is: " + str(test_list)) out_list=[int(i) for i in test_list] print("Out list is: " + str(out_list))
方法三: 使用map():
# Python3 code to demonstrate # converting list of strings to int # using map() test_list=['1','3','2','6','8'] print("Original list is: " + str(test_list)) out_list=list(map(int,test_list)) print("Out list is: " + str(out_list))
运算结果:
Original list is: ['1', '3', '2', '6', '8'] Out list is: [1, 3, 2, 6, 8]