[Python] Python Regex (Pattern Matching) phone number start with area code search

I tried to write logic to extract the phone number which starts with certain area codes (first 3 digits of the phone number) in a given data file. My code is:

import re

data = "This is the sample test data. 2247279133 224dfa7279133 dhana 5107279133 subha 123456789 "

pattern = re.compile(r"((224|510)\d{7})")
matches = pattern.findall(data)

for match in matches:
print (match[0])


I am getting the expected output as below:

2247279133

5107279133
​

Though I am getting the expected output I would like to know below things:

1. Is this an efficient way?
2. Is it possible to pass the list of area codes as an array variable instead of hardcoding (224|510)?
3. what is the recommended way to search these kinds of phone numbers over large file of 10 GB?

Continue reading...