Python从文件输出内容

Question

When I'm running the program it is outputting that no countries exist starting with that letter, when in fact they exist. Can someone tell me what I'm doing wrong or maybe give me an alternate way to only output countries starting with the wanted letter. This is my code:

#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)

Thank you

Answer 1

Please also provide the input format of your Countries.txt file as well as the python version you are using st it is easier to help you.

For a start: open() will not provide you with the file content but only gives you the textwrapper object. Try changing the line to

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

Answer 2

A slightly simpler version. Try this:

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')