Question

我正在尝试创建一个for循环，将列表中的每一行打印到文件中，但是我收到此错误。有帮助吗？感谢

def write_file(filename, rabbitlist, foxlist, finallist, averagefox, averagerabbit):

    # Opens File for Data Input
    outfile = open(str(filename) + ".csv", 'w')

    # Writes Data to Newly Created File
    finalresult = "\n".join(", ".join(map(str, l)) for l in finallist)
    outfile.write(str("Day, Foxes, Rabbits, , Average Foxes, Average Rabbits\n"))
    lastline = [0, foxlist[0], rabbitlist[0], " ", averagefox, averagerabbit]
    for item in lastline:
        outfile.write(" %s", item)
    outfile.close()

我得到的错误是：Python: TypeError: takes exactly 1 argument (2 given)

Answer 1

。只写accepts 1 parameter所以我认为你可以这样做

def write_file(filename, rabbitlist, foxlist, finallist, averagefox, averagerabbit):

    # Opens File for Data Input
    outfile = open(str(filename) + ".csv", 'w')

    # Writes Data to Newly Created File
    finalresult = "\n".join(", ".join(map(str, l)) for l in finallist)
    outfile.write(str("Day, Foxes, Rabbits, , Average Foxes, Average Rabbits\n"))
    lastline = [0, foxlist[0], rabbitlist[0], " ", averagefox, averagerabbit]
    for item in lastline:
        outfile.write(" %s" % item)
    outfile.close()

Answer 2

由于您正在使用csv，为什么不使用csv模块。然后你的方法变成：

import csv

def write_file(filename,
               rabbitlist,
               foxlist,
               finallist,
               averagefox,
               averagerabbit):
    header_row = ['Day','Foxes','Rabbits',' ','Average Foxes','Average Rabbits']
    with open(filename,'w') as f:
        writer = csv.writer(f, delimiter=',')
        writer.writerow(header_row)
        writer.writerows(finallist)
        writer.writerow([0,
                         foxlist[0],
                         rabbitlist[0],
                         " ",
                         averagefox,
                         averagerabbit])

with_statement会自动关闭文件，而csv模块会writerows执行名称所示的操作。

Answer 3

在python中，File的方法只接受一个参数，而你传递两个参数。

你可以做outfile.write（“％s”％item）

或者更好的方法是使用Pickle

用于将每行打印到文件的循环。错误

3 个答案: