python之计算文件中的大写字母、小写字母、数字和空格

我的任务是计算 .txt 文件中的大写、小写、数字和空白字符。

我尝试了多种方法，但似乎不太正确。我不知道我要去哪里。

这是我得到的输出:

大写计数为0 小写计数为 0 位数为0 空白计数为 0

代码:

def main(): 
 
    uppercase_count = 0 
    lowercase_count = 0 
    digits_count = 0 
    whitespace_count = 0 
 
    uppercase =['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'] 
    lowercase = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'] 
    digits = ['0','1','2','3','4','5','6','7','8','9'] 
    whitespace = [' '] 
 
    infile = open("text.txt", "r") 
 
    data = infile.readlines() 
 
    for character in data: 
        if character in uppercase: 
            uppercase_count += 1 
 
    for character in data: 
        if character in lowercase: 
            lowercase_count += 1 
 
    for character in data: 
        if character in digits: 
            digits_count += 1 
 
    for character in data: 
        if character in whitespace: 
            whitespace_count += 1 
 
    print('The uppercase count is',uppercase_count) 
    print('The lowercase count is',lowercase_count) 
    print('The digit count is',digits_count) 
    print('The whitespace count is',whitespace_count) 
 
main() 

请您参考如下方法:

你可以简单地使用内置函数

for character in data: 
    if character.isupper(): 
        uppercase_count += 1 
    elif character.islower(): 
        lowercase_count += 1 
    elif character.isspace(): 
        whitespace_count +=1 
    elif character.isdigit(): 
        digit_count +=1 

您也可以使用以下命令计算每一行的字符数。

digit_count,whitespace_count,lowercase_count,uppercase_count=0,0,0,0 
lines = infile.readlines() 
for data in lines: 
    for character in data: 
        if character.isupper(): 
            uppercase_count += 1 
        elif character.islower(): 
            lowercase_count += 1 
        elif character.isspace(): 
            whitespace_count +=1 
        elif character.isdigit(): 
            digit_count +=1