Python中的"没有那个文件"错误(FileNotFoundError)的解决方法详解

with open('data.txt', 'r') as f:
    content = f.read()

with open('C:\data\data.txt', 'r') as f:
    content = f.read()

with open(r'C:\data\data.txt', 'r') as f:
    content = f.read()

with open('/restricted/data.txt', 'r') as f:
    content = f.read()

import os
 
file_path = 'data.txt'
if os.path.exists(file_path):
    with open(file_path, 'r') as f:
        content = f.read()
else:
    print("文件不存在!")

from pathlib import Path
 
file_path = Path('data.txt')
if file_path.exists():
    content = file_path.read_text()
else:
    print("文件不存在!")

import os
 
# 获取当前工作目录
current_dir = os.getcwd()
 
# 拼接路径
file_path = os.path.join(current_dir, 'data.txt')
 
# 检查文件是否存在
if os.path.exists(file_path):
    with open(file_path, 'r') as f:
        content = f.read()
else:
    print("文件不存在!")

from pathlib import Path
 
# 获取当前工作目录
current_dir = Path.cwd()
 
# 拼接路径
file_path = current_dir / 'data.txt'
 
# 检查文件是否存在
if file_path.exists():
    content = file_path.read_text()
else:
    print("文件不存在!")

import requests
 
url = 'https://example.com/data.txt'
response = requests.get(url)
if response.status_code == 200:
    content = response.text
else:
    print("无法访问远程文件")

import os
 
file_path = os.getenv('DATA_PATH', 'default_path')
if os.path.exists(file_path):
    with open(file_path, 'r') as f:
        content = f.read()
else:
    print("环境变量中的文件路径不存在!")

import tempfile
 
# 创建一个临时文件
with tempfile.NamedTemporaryFile(delete=False) as temp_file:
    temp_file_path = temp_file.name
    # 写入数据到临时文件
    with open(temp_file_path, 'w') as f:
        f.write("这是临时文件的内容")
 
# 读取临时文件的内容
with open(temp_file_path, 'r') as f:
    content = f.read()
    print(content)
 
# 删除临时文件
os.remove(temp_file_path)

def validate_path(file_path):
    if not os.path.exists(file_path):
        print(f"文件不存在: {file_path}")
        return False
    return True
 
file_path = 'data.txt'
if validate_path(file_path):
    with open(file_path, 'r') as f:
        content = f.read()

try:
    with open('data.txt', 'r') as f:
        content = f.read()
except FileNotFoundError:
    print("文件不存在，请检查路径")
except Exception as e:
    print(f"发生错误: {e}")