Question

当我运行该程序时，它输出的是从该字母开始没有国家存在，而实际上它们存在。有人可以告诉我我做错了什么，或者可能只给我一个替代方式来输出以通缉信开头的国家。这是我的代码：

#Creating the list
CountryList = []
CountryandPopulationList = []
#Creating the Function1
def Function1(fh,letter):
    count = 0
    #Adding the file to the list
    for word in fh:
        CountryandPopulationList.append(word)
        index = word.find('-')
        Country = word[0:index]
        CountryList.append(Country.strip()) 

    #Printing countries starting with chosen letter
    try:
        for i in CountryList:
            if(i[1]== letter):
                print(i)
                count = count + 1
            else:
                print('The letter does not exist')
    except IndexError:
        print('Total number of countries starting with letter',letter,'=',count )

#Asking user to input letter
letter = input('Enter the first letter of the country: ')

#Opening the file 
try:
    fh = open('D:\FOS\\Countries.txt','r')
except IOError:
    print('File does not exist')
else:
    function1 = Function1(fh,letter)

谢谢

Answer 1

还请提供您的Countries.txt文件的输入格式以及您正在使用s.t的python版本。它更容易帮助你。

首先：open（）不会为您提供文件内容，但只提供textwrapper对象。尝试将行更改为

fh = open('D:\FOS\...\Countries.txt', 'r').read()

Answer 2

稍微简单的版本。试试这个：

def function1(fh, letter):
    count = 0
    country_list = [line.split('-')[0].strip() for line in fh.readlines()]

    for country in country_list:
        if country.lower().startswith(letter.lower()):
            count += 1
            print(country)
    print("Total number of countries starting with letter '%s'= %d" % (letter, count))


#Asking user to input letter
letter = input('Enter the first letter of the country: ')

#Opening the file
try:
    with open('D:\FOS\\Countries.txt','r') as fh:
        function1(fh, letter)
except IOError:
    print('File does not exist')

Python从文件输出内容

2 个答案: