(Python初学者)输出文件在我的代码中为空

Question

我是Python的新手，在文件中处理输入和输出。以下是输入文件：

1 3
1 1
1 0
20 30

下面是我的代码，它将其视为"soccer_in.txt“，并假设将以下内容输出到”soccer_out.txt“中：

Season: 1, Games Played: 1, Points earned: 3
Possible Win-Tie-Loss Records
-----------------------------
1-0-0

Season: 2, Games Played: 1, Points earned: 1
Possible Win-Tie-Loss Records
-----------------------------
0-1-0

Season: 3, Games Played: 1, Points earned: 0
Possible Win-Tie-Loss Records
-----------------------------
0-0-1

Season: 4, Games Played: 20, Points earned: 30
Possible Win-Tie-Loss Records
-----------------------------
10-0-10
9-3-8
8-6-6
7-9-4
6-12-2
5-15-0

使用以下代码：

def process_season(output_file, season, games_played, points_earned):
    output_file.write("Season: " + str(season) + ", Games Played: " + str(games_played) +
          ", Points earned: " + str(points_earned))
    output_file.write("Possible Win-Tie-Loss Records")
    output_file.write("-----------------------------")
    wins = int(points_earned) // 3
    ties = int(points_earned) % 3
    losses = int(games_played) - wins - ties
    while (wins >= 0) and (losses >= 0):
            output_file.write(str(wins) + "-" + str(ties) + "-" + str(losses))
            wins -= 1
            ties += 3
            losses -= 2
# --------------------------------------
def process_seasons(input_file, output_file):
    season_number = 0
    for season in input_file:
        season_number += 1
    process_season(output_file, season_number, season[0], season[1])
# --------------------------------------
f_in=open("soccer-in.txt", "r")
f_out=open("soccer-out.txt", "w+")
process_seasons(f_in, f_out)

我没有得到任何错误，但我的输出文件是空的，当我运行我的代码。我不确定发生了什么，任何帮助都将不胜感激。谢谢!

编辑:到目前为止，提出的解决方案都没有奏效。我运行了该文件，但仍然是空白的“file output.txt”。我看到了关闭文件的问题，但这并没有解决输出文件为空的事实。

编辑2:不要紧！我在我的计算机上打开了输入文件，这不允许代码工作。谢谢大家

Answer 1

您应该将您的代码重写到上下文管理器表单中：

def process_season(output_file, season, games_played, points_earned):
    output_file.write("Season: " + str(season) + ", Games Played: " + str(games_played) +
          ", Points earned: " + str(points_earned))
    output_file.write("Possible Win-Tie-Loss Records")
    output_file.write("-----------------------------")
    wins = int(points_earned) // 3
    ties = int(points_earned) % 3
    losses = int(games_played) - wins - ties
    while (wins >= 0) and (losses >= 0):
            output_file.write(str(wins) + "-" + str(ties) + "-" + str(losses))
            wins -= 1
            ties += 3
            losses -= 2
# --------------------------------------
def process_seasons(input_file, output_file):
    season_number = 0
    for season in input_file:
        season_number += 1
    process_season(output_file, season_number, season[0], season[1])
# --------------------------------------
with open("soccer-in.txt", "r") as f_in:
    with open("soccer-out.txt", "w+") as f_out:
        process_seasons(f_in, f_out)

有了上下文管理器，文件对象将自动关闭。所以你不需要担心结束语。

Answer 2

问题是您在打开文件后无法将其关闭。为了防止出现这种情况，请使用with上下文管理器来读写文件。

with open(file_name, 'r') as f:
    f.read()
with open(file_name, 'w') as f:
    f.write(data)

Answer 3

您不需要关闭文件。尽管你应该这么做。

垃圾收集器会处理它的。但是，您确实需要更改代码，使用\n处理换行符，并且还需要在process_seasons函数中将行拆分为单词。..The下面的代码在我的计算机上运行，并提供您正在寻找的输出。

def process_season(output_file, season, games_played, points_earned):
    output_file.write("Season: " + str(season) + ", Games Played: " + str(games_played) +
          ", Points earned: " + str(points_earned) + '\n')
    output_file.write("Possible Win-Tie-Loss Records\n")
    output_file.write("-----------------------------\n")
    wins = int(points_earned) // 3
    ties = int(points_earned) % 3
    losses = int(games_played) - wins - ties
    while (wins >= 0) and (losses >= 0):
            output_file.write(str(wins) + "-" + str(ties) + "-" + str(losses)+'\n')
            wins -= 1
            ties += 3
            losses -= 2
# --------------------------------------
def process_seasons(input_file, output_file):
    season_number = 0
    for season in input_file:
        season_number += 1
        seas = season.split()
        process_season(output_file, season_number, seas[0], seas[1])
# --------------------------------------
f_in=open("soccer-in.txt", "r")
f_out=open("soccer-out.txt", "w+")
process_seasons(f_in, f_out)