Python 常见的获取文本文件的行数的多种方法

使用len(file.readlines())：

file_path = 'your_file.txt'
with open(file_path, 'r') as file:
    line_count = len(file.readlines())
print("方法1 - 文本文件的行数:", line_count)

使用sum(1 for line in file)：

file_path = 'your_file.txt'
with open(file_path, 'r') as file:
    line_count = sum(1 for line in file)
print("方法2 - 文本文件的行数:", line_count)

逐行迭代计数：

file_path = 'your_file.txt'
line_count = 0
with open(file_path, 'r') as file:
    for line in file:
        line_count += 1
print("方法3 - 文本文件的行数:", line_count)

使用wc命令（仅限Unix/Linux系统）：

import subprocess

file_path = 'your_file.txt'
line_count = int(subprocess.check_output(["wc", "-l", file_path]).split()[0])
print("方法4 - 文本文件的行数:", line_count)

使用pandas库：

import pandas as pd

file_path = 'your_file.txt'
df = pd.read_csv(file_path, header=None)
line_count = len(df)
print("方法5 - 文本文件的行数:", line_count)