使用“ for file in file”在Python中打印动态行

Question

I'm writing a program where a user can enter a beginning year and an end year, and the program will print out the winners of a book award for all the years in between. Here is what I have so far:

ui = input("Enter a beginning year('q' or 'Q' to quit): ")
ui2 = input("Enter an ending year: ")
file = open("bookListFile.txt", "r")



def getBook(user, user2):
    yearsBetween = int(ui2) - int(ui)
    yearCount = 0
    for line in file:
        while user in line and user.isdigit() and yearCount < yearsBetween:
            print(line)
            yearCount += 1



    getBook(ui, ui2)

The problem here is when I print the line, it prints the same line over and over. For example, when I enter 1985 as the beginning year and 2000 as the end year, it will print the same line 15 times instead of the years in between.

Can I get some help here? If possible, could you explain how you did it too?

Answer 1

It looks like the while loop is getting caught up and from what I see I think this program would be better served by the range function. (for posterity Python's range() Function Explained )

def get_book(user, user2):
    year_range = range(user, user2)
    #Instead of manually counting up through the numbers a list is automatically 
    #created through range of the numbers. Starting at user, ending at user2 and auto 
    # stepping up by 1.
    for line in file:
        for i in year_range:
            #Instead of using a while loop and a manual count the for loop auto 
            #counts through the range
            if str(i) in line:
                print(line)

If you have any other questions or comments please let me know.