擅长:python、mysql、java
<p>检查字符串中的字符是否是数字或不使用regex</p>
<pre><code>import re
string2=''
prev_char=''
for i in open(user_file, 'r').read():
if not re.search('\d',i):
prev_char=i
string2+=i
else:
string2+=prev_char*int(i)
with open('test.txt', 'w') as file_out:
file_out.write(string2)
</code></pre>