Question

我相对较新的Python并且在文件中输入和输出。这是输入文件：

这是我的代码，将其作为“soccer_in.txt”，并假设将以下内容输出到“soccer_out.txt”：

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

使用此代码：

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)

我没有收到任何错误，但是当我运行代码时输出文件为空。我不确定发生了什么，任何帮助将不胜感激。谢谢！

编辑：到目前为止，所提议的解决方案都没有奏效。我运行该文件，“soccer-output.txt”仍为空白。我看到关闭文件的问题，但这并没有解决输出文件为空的事实。

编辑2：NEVERMIND！我在我的计算机上打开了输入文件，但不允许代码工作。谢谢大家

Answer 1

您应该将代码重写为上下文管理器表单：

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)

使用上下文管理器，文件对象将自动关闭。所以你不必担心结束。

Answer 2

问题是您在打开文件后无法关闭文件。为了帮助防止这种情况，请使用with context manager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

您无需关闭文件。虽然你应该。

垃圾收集器会处理它。但是您需要更改代码，使用\n计算换行符，并且还需要在process_seasons函数中将行拆分为单词。 ..以下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)

（Python初学者）我的代码中输出文件为空

3 个答案: