python - 使用 json 格式化字符串

Question

这是一个名为 subtitles.ass 的文件。如果你看一下，你会发现我定义了 {font_size} 和 {sentence[0}。显然我想用我的输入数据来格式化它们。

[Script Info]
; Script generated by FFmpeg/Lavc57.107.100
ScriptType: v4.00+
PlayResX: 384
PlayResY: 288

[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: sorry,Arial,{font_size},&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,2,1,2,10,10,12,1


[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.97,0:00:01.50,sorry,,0,0,0,,{sentence[0]}
Dialogue: 0,0:00:03.11,0:00:04.39,sorry,,0,0,0,,{sentence[1]}
Dialogue: 0,0:00:05.18,0:00:07.26,sorry,,0,0,0,,{sentence[2]}
Dialogue: 0,0:00:07.26,0:00:09.91,sorry,,0,0,0,,{sentence[3]}
Dialogue: 0,0:00:10.00,0:00:11.26,sorry,,0,0,0,,{sentence[4]}
Dialogue: 0,0:00:11.63,0:00:12.70,sorry,,0,0,0,,{sentence[5]}
Dialogue: 0,0:00:13.61,0:00:16.01,sorry,,0,0,0,,{sentence[6]}
Dialogue: 0,0:00:18.08,0:00:19.60,sorry,,0,0,0,,{sentence[7]}
Dialogue: 0,0:00:19.60,0:00:21.60,sorry,,0,0,0,,{sentence[8]}

首先，我从 subtitles.ass 读取数据。

with open(subtitles_file, 'r') as file:
    subtitles = file.read()

现在输入数据来了。

{
  "font_size": "47",
  "sentences": [
   ....
  ]
}

最后我想用上面的 json 数据格式化字幕。简单来说，我想将 {font_size} 替换为 47。data 位于 json 之上。

subtitles.format(data.get('font_size'), data.get('sentences'))

但是我遇到了错误。

Traceback (most recent call last): File "iemoji.py", line 17, in subtitles.format(data.get('font_size'), data.get('sentences')) KeyError: 'font_size'

编辑数据

我像这样加载数据。

data = json.load(file)

Answer 1

您需要在 format 函数中解压字典以获取键值对。

尝试:

subtitles.format(**data)

这正是 format_map 的用途。

subtitles.format_map(data)

工作示例:

import json

subtitles = """[Script Info]
; Script generated by FFmpeg/Lavc57.107.100
ScriptType: v4.00+
PlayResX: 384
PlayResY: 288

[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: sorry,Arial,{font_size},&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,2,1,2,10,10,12,1


[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.97,0:00:01.50,sorry,,0,0,0,,{sentence[0]}
Dialogue: 0,0:00:03.11,0:00:04.39,sorry,,0,0,0,,{sentence[1]}
Dialogue: 0,0:00:05.18,0:00:07.26,sorry,,0,0,0,,{sentence[2]}
Dialogue: 0,0:00:07.26,0:00:09.91,sorry,,0,0,0,,{sentence[3]}
Dialogue: 0,0:00:10.00,0:00:11.26,sorry,,0,0,0,,{sentence[4]}
Dialogue: 0,0:00:11.63,0:00:12.70,sorry,,0,0,0,,{sentence[5]}
Dialogue: 0,0:00:13.61,0:00:16.01,sorry,,0,0,0,,{sentence[6]}
Dialogue: 0,0:00:18.08,0:00:19.60,sorry,,0,0,0,,{sentence[7]}
Dialogue: 0,0:00:19.60,0:00:21.60,sorry,,0,0,0,,{sentence[8]}"""

data_str = """{
    "font_size": "47",
    "sentence": [
        "sample sentence0",
        "sample sentence1",
        "sample sentence2",
        "sample sentence3",
        "sample sentence4",
        "sample sentence5",
        "sample sentence6",
        "sample sentence7",
        "sample sentence8",
        "sample sentence9"
    ]
}"""

data = json.loads(data_str)
print(subtitles.format(**data))#or
#print(subtitles.format_map(data))