尝试在运行中调用函数时出现类型错误

Question

编辑；感谢大家！它现在可以工作了！

我正在尝试制作一个读取 csv 文件并使用该数据进行计算的程序。我的csv_reader 函数和average_temperature 函数独立工作，但我不明白如何在run() 函数中调用它们。

我理解错误的含义，但我完全不知道如何修复它，但这是我得到的最接近的。它以这个错误结束，然后下面是代码：

Traceback (most recent call last):
  File "main.py", line 100, in <module>
    run()
  File "main.py", line 82, in run
    avgfile = average_temperature("Temperatures.csv", input)
  File "main.py", line 40, in average_temperature
    if filter in row[date_index]:
TypeError: 'in <string>' requires string as left operand, not builtin_function_or_method

代码：

import csv


date_index = 0
temp_index = 2


def csv_reader(file):
    lst = []
    with open("Temperatures.csv", 'r') as weather_file:
        weather_reader = csv.reader(weather_file)
        first_row = True
        for row in weather_reader:
            if first_row:
                first_row = False
                continue
            lst.append(row)
    return lst

def average_temperature(weather, filter):
    thefile = csv_reader("Temperatures.csv")
    sum = 0
    len = 0
    for row in thefile:
        if filter in row[date_index]:
            sum += float(row[temp_index])
            len += 1
    avg = sum / len
    return avg

def run():
    thefile = csv_reader("Temperatures.csv")
    avgfile = average_temperature("Temperatures.csv", input)

    print("{}".format(avgfile))

    return

if __name__ == '__main__':
    run()

Answer 1

错误是因为input 是built-in function 的名称。我认为您需要做的是 call 它并获取一个值作为 filter 参数传递给您的 average_temperature() 函数，如下所示：

def run():
    date_filter = input('What date? ')  # Get value from user.
    thefile = csv_reader("Temperatures.csv")
    avgfile = average_temperature("Temperatures.csv", date_filter)

    print("{}".format(avgfile))

    return