（Python初學者）我的代碼中的輸出文件為空

Question

我是Python的新手，致力於文件的輸入和輸出。 這是輸入文件：

1 3
1 1
1 0
20 30

這是我的代碼，將其作為“ soccer_in.txt”，並假設將以下內容輸出到“ 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

使用此代碼：

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)

我沒有收到任何錯誤，但是運行代碼時輸出文件為空。 我不確定發生了什么，任何幫助將不勝感激。 謝謝！

編輯：到目前為止，所有提議的解決方案都沒有起作用。 我運行該文件，“ soccer-output.txt”仍然為空。 我看到了關閉文件的問題，但是並沒有解決輸出文件為空的事實。

編輯2：沒關系！ 我在計算機上打開了輸入文件，這不允許代碼工作。 謝謝你們

Answer 1

您應該將代碼重寫為上下文管理器形式：

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，文件對象將自動關閉。 因此，您不必擔心結賬。

Answer 2

問題是打開文件后您無法關閉文件。 為了幫助防止這種情況，請使用with上下文管理器來讀取和寫入文件。

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

Answer 3

您不需要關閉文件。 雖然你應該。

垃圾收集器會照顧好它。 但是您確實需要更改代碼，使用\\n來考慮換行符，並且還需要在process_seasons函數中將行拆分為單詞。 ..以下代碼在我的計算機上運行，​​並提供您要查找的輸出。

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)