使用 python 提取文本文件的一部分

Question

我有一個文本文件，格式如下：

初始化
背景
開始_測量1
1
2
3
...
100
End_Measurement1
開始_測量2
1
2
3
...
75
End_Measurement2

我想存儲Starting_Measurement1和End_Measurement1之間的值，然后存儲Starting_Measurement2和End_Measurement2之間的值，但值的數量是可變的

在 python 中是否有一種干凈的方法可以做到這一點？

Answer 1

b = textInput.split('\n')

start1 = b.index('Starting_Measurement1')
end1 = b.index('End_Measurement1')

measureList1 = list(b[start1:end1])

並重復其他測量

Answer 2

它可能不是最優雅的解決方案，但它應該做你想做的事：

名為data.txt的文本文件的內容：

Initialization
Background
Starting_Measurement1
1
2
3
4
5
100
End_Measurement1
Starting_Measurement2
1
2
3
75
End_Measurement2

讀取文件並將數字提取到列表列表中的代碼：

with open('data.txt') as f:
    s = f.read()

all_measurements = []
reading = False
for line in s.splitlines():
    if line.startswith('Starting_Measurement'):
        current_measurements = []
        reading = True
    elif line.startswith('End_Measurement'):
        all_measurements.append(current_measurements)
        reading = False
    elif reading:
        value = int(line)
        current_measurements.append(value)

print(all_measurements)

導致：

[[1, 2, 3, 4, 5, 100], [1, 2, 3, 75]]

Answer 3

filename = "measurements.txt"

measurements = []
measurement_lines = []
line_in_measurement = False
with open(filename, "rt") as file:
    for line in file:
        line = line.strip("\n")
        if "Starting_Measurement" in line:
            measurement_lines = []
            line_in_measurement = True
        elif "End_Measurement" in line:
            measurements.append(measurement_lines)
            line_in_measurement = False
        elif line_in_measurement:
            measurement_lines.append(line)

for measure_number, measure in enumerate(measurements):
    print(f"measurement {measure_number}")
    print(measure)

Answer 4

你可以使用re ：

import re

re_numbers = re.compile(
    r"Starting_Measurement(1|2)(.*?)End_Measurement(?:1|2)",
    re.DOTALL
)

with open("file.txt", "r") as file:
    res = {
        n: numbers.strip().splitlines()
        for n, numbers in re_numbers.findall(file.read())
    }

以下文件file.txt的結果res

Initialization
Background
Starting_Measurement1
1
2
End_Measurement1
Starting_Measurement2
1
2
3
4
5
End_Measurement2
End

是

{'1': ['1', '2'], '2': ['1', '2', '3', '4', '5']}