python学习日记01

合集 - Python学习(4)

1.python学习日记012023-07-07

2.pip安装错误记录2023-10-113.geopandas安装记录2023-10-164.虚拟环境中安装ruamel.yaml2023-10-16

收起

1 读取.txt文件

with open("./Log.txt", "r") as f:  # 打开文件
    data = f.read() 

2 查询字符串中特定字符的个数

?

1	特定字符个数 = 字符串名.count('特定字符')

3 查询字符串中特定字符的索引

?

1 2 3 4

idx = [r.span() for r in re.finditer('a', 'aaabbbaccda')]   >>idx [(0, 1), (1, 2), (2, 3), (6, 7), (10, 11)]

4 将字符串按 特定字符进行切割

?

1 2 3 4 5

str =  'aa bb cc dd ee ff ga' str_clip = str.split(' ')   >>str_clip ['aa', 'bb', 'cc', 'dd', 'ee', 'ff', 'ga']