I'm Sure There's A Better Way
aleaxit at yahoo.com
Sat Jul 7 09:38:20 CEST 2001
"Tim Daneliuk" <tundra at tundraware.com> wrote in message
news:3B465858.CB7F38E8 at tundraware.com...
> I want a function to check a string to make sure it is a legitimate
> dollar amount. Which means it follows these rules:
> First character is numeric or "-"
> At most, one "." is allowed and, if present, is followed by exactly two
> All the remaining characters must be in the range "0" - "9"
These specs seem to be equivalent to:
one or more digits
optional: . followed by two digits
end of string
This is very easy to express as a Regular Expression:
So one function to check any string to see if it satisfies
this pattern is:
return re.match(r'-?\d+(\.\d\d)?$', astring)
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