Regex Expression To Find 5-digit Code

Trying to find pattern matches based on the following conditions: Length of string is 5 characters Char [0] = Letter/Number Char [1] = Letter Char [2-4] = Number I don't understa

Solution 1:

\w matches letters and digits (as well as underscores).

Use [a-zA-Z] if you want to match only letters:

r'\w[a-zA-Z]\d{3,}'

which matches a letter or digit (or an underscore), then a letter, then 3 digits.

Demo:

>>>import re>>>p = r'\w[a-zA-Z]\d{3,}'>>>re.match(p, "22222")>>>re.match(p, "AA012")
<_sre.SRE_Match object at 0x105aca718>
>>>re.match(p, "1A222")
<_sre.SRE_Match object at 0x105aca780>
>>>re.match(p, "_A222")
<_sre.SRE_Match object at 0x105aca718>

If the underscore is a problem, use:

r'[a-zA-Z\d][a-zA-Z]\d{3}'