计算文件

Question

我的任务是计算.txt文件中的大写，小写，数字和空格字符。

我已经尝试过多种方式，但我似乎无法做到这一点。我无法弄清楚我在哪里。

这是我得到的输出：

大写计数为0 小写计数为0 数字计数为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()

Answer 1

你可以简单地使用内置功能

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

也可以使用以下内容让每一行都计入字符数。

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

Answer 2

您正在逐行阅读，而不是char，所以您通过read将其作为整个字符串阅读，并且最好将所有for个循环分组这样做：

data = infile.read()

for character in data:
    if character in uppercase:
        uppercase_count += 1

    elif character in lowercase:
        lowercase_count += 1

    elif character in digits:
        digits_count += 1


    elif character in whitespace:
        whitespace_count += 1

编辑：

此外，您没有理由在列表中存储所有upper-case，lower-case，digits和white space个字符，请使用{{1} }模块，已经准备好了所有这些：

string

更好的方法是使用内置方法：

isupper（），islower（）..您可以检查它们here。

Answer 3

data = infile.read()

请勿阅读lines，而是将整个字符串作为整个字符串阅读。如果您阅读character行line，则可能需要character

Answer 4

data = infile.read()
value = [ i for i in data]
upper = len(list(filter(lambda x: x.isupper(), value)))
digit = len(list(filter(lambda x: x.isdigit(), value)))
space = len(list(filter(lambda x: x.isspace(), value)))