python开发_count()
python中的count()函数，从字面上可以知道，他具有统计功能下面来看看具体的demo：
功能：读取一个文件'c:\\test.txt'，统计出该文件中出现字符'a'的次数
1 #python open
2 import os
3
4 number = 0
5
6 def get_number_of_char(filePath, c):
7 '''
8 from path, the system will get the file
9 finally return the number char: c
10 '''
11 if os.path.exists(filePath):
12 global number
13 with open(filePath, 'r') as fp:
14 for line in fp:
15 a = line.count(c)
16 number = number + a
17 else:
18 print('the path:[{}] is not exist!'.format(filePath))
19
20 def main():
21 file_path = 'c:\\test.txt'
22 get_number_of_char(file_path, 'a')
23 print(number)
24
25 if __name__ == '__main__':
26 main()
运行效果：
页:
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