Question

我目前遇到以下代码问题，请看一下：

 def readData(fileName):
    inputFile = open(fileName, 'r')
    yearList = []
    locList = []
    line = inputFile.readline()
    while line != "":
        line = line.strip()
        year, loc = line.split("\t")
        yearList = yearList + [year]
        locList = locList + [loc]
        line = inputFile.readline()
    inputFile.close()
    return yearList, locList

def findLocation(yearList, locList, year):
    location = "Not Found"
    for i in range(len(locList)):
        if locList[i] == year:
            location = locList[i]
    print(location)

def main():

    fileName = input("Please enter the name of the file here:")
    yearList, locList = readData(fileName)
    print(yearList)
    print(locList)
    year = int(input("Enter the year you want the function to look for in the data:"))
   location = findLocation(yearList, locList, year)

每次运行代码时，它都会执行findLocation函数之前的所有操作，它不会返回值，而是返回＆＃34; Not Found＆＃34;。我已经尝试改变循环并尝试索引和类似的东西，但我只是无法弄清楚为什么它会一直返回＆＃34; Not Found＆＃34;而不是位置。谁能帮我？

Answer 1

执行此操作时：

year, loc = line.split("\t")

您将字符串分配给year，然后将此字符串附加到您的yearList。

但是，你做了

year = int(input("Enter the year you want the function to look for in the data:"))

并为本地变量year分配一个整数。最终发生的是你将一个整数与一个字符串进行比较，例如你最终会为每个案件"2016"==2016做False。

要更正此问题，请删除int()功能并仅使用字符串。

Python函数不会从列表中返回值

1 个答案: