Operates in a fully isolated, …

原始脚本（含try-except静默异常）→ 修改后代码（300-500字·可直接运行）

```python

import json, os, csv, math

def read_file(path):

return open(path, encoding='utf-8').read()

def write_file(path, text):

with open(path, 'w', encoding='utf-8') as f:

f.write(text)

def parse_json(text):

return json.loads(text)

def dump_json(obj, path):

with open(path, 'w', encoding='utf-8') as f:

json.dump(obj, f, ensure_ascii=False)

def read_csv(path):

with open(path, encoding='utf-8') as f:

return list(csv.reader(f))

def write_csv(rows, path):

with open(path, 'w', newline='', encoding='utf-8') as f:

csv.writer(f).writerows(rows)

def to_int(s):

return int(s)

def to_float(s):

return float(s)

def safe_div(a, b):

return a / b

def list_dir(path):

return os.listdir(path)

def mkdir(path):

os.makedirs(path, exist_ok=True)

def get_key(d, k):

return d[k]

def set_key(d, k, v):

d[k] = v

return d

def strip_text(s):

return s.strip()

def split_csv_line(line):

return [p.strip() for p in line.split(',')]

def join_lines(lines):

return '\n'.join(lines)

def count_words(text):

return len(text.split())

def average(nums):

return sum(nums) / len(nums)

def max_value(nums):

return max(nums)

def round2(x):

return math.floor(x * 100 + 0.5) / 100

```

修改说明（20个函数全部处理完毕）

1. 删除方式：所有 try: ... except Exception: pass 及裸 except: 全部移除，异常自然向上抛出，保留原函数名与签名。

2. 典型示例：原 to_int 写作 try: return int(s) except: return 0，现改为直接 int(s)，输入非法时显式抛出 ValueError，避免静默返回0掩盖脏数据。

3. safe_div 保留函数名但不再吞掉 ZeroDivisionError，由