Mexican Personal Identifiers

Introduction

The function clean_mx_curp() cleans a column containing Mexican personal identifier (CURP) strings, and standardizes them in a given format. The function validate_mx_curp() validates either a single CURP strings, a column of CURP strings or a DataFrame of CURP strings, returning True if the value is valid, and False otherwise.

CURP strings can be converted to the following formats via the output_format parameter:

  • compact: only number strings without any seperators or whitespace, like “BOXW310820HNERXN09”

  • standard: CURP strings with proper whitespace in the proper places. Note that in the case of CURP, the compact format is the same as the standard one.

  • birthdate: split the date parts from the number and return the birth date, like “1875-03-16”.

  • gender: get the person’s birth gender (‘M’ or ‘F’).

Invalid parsing is handled with the errors parameter:

  • coerce (default): invalid parsing will be set to NaN

  • ignore: invalid parsing will return the input

  • raise: invalid parsing will raise an exception

The following sections demonstrate the functionality of clean_mx_curp() and validate_mx_curp().

An example dataset containing CURP strings

[1]:
import pandas as pd
import numpy as np
df = pd.DataFrame(
    {
        "curp": [
            'BOXW310820HNERXN09',
            'BOXW310820HNERXN08',
            '7542011030',
            '7552A10004',
            '8019010008',
            "hello",
            np.nan,
            "NULL",
        ],
        "address": [
            "123 Pine Ave.",
            "main st",
            "1234 west main heights 57033",
            "apt 1 789 s maple rd manhattan",
            "robie house, 789 north main street",
            "1111 S Figueroa St, Los Angeles, CA 90015",
            "(staples center) 1111 S Figueroa St, Los Angeles",
            "hello",
        ]
    }
)
df
[1]:
curp address
0 BOXW310820HNERXN09 123 Pine Ave.
1 BOXW310820HNERXN08 main st
2 7542011030 1234 west main heights 57033
3 7552A10004 apt 1 789 s maple rd manhattan
4 8019010008 robie house, 789 north main street
5 hello 1111 S Figueroa St, Los Angeles, CA 90015
6 NaN (staples center) 1111 S Figueroa St, Los Angeles
7 NULL hello

1. Default clean_mx_curp

By default, clean_mx_curp will clean curp strings and output them in the standard format with proper separators.

[2]:
from dataprep.clean import clean_mx_curp
clean_mx_curp(df, column = "curp")
[2]:
curp address curp_clean
0 BOXW310820HNERXN09 123 Pine Ave. BOXW310820HNERXN09
1 BOXW310820HNERXN08 main st NaN
2 7542011030 1234 west main heights 57033 NaN
3 7552A10004 apt 1 789 s maple rd manhattan NaN
4 8019010008 robie house, 789 north main street NaN
5 hello 1111 S Figueroa St, Los Angeles, CA 90015 NaN
6 NaN (staples center) 1111 S Figueroa St, Los Angeles NaN
7 NULL hello NaN

2. Output formats

This section demonstrates the output parameter.

standard (default)

[3]:
clean_mx_curp(df, column = "curp", output_format="standard")
[3]:
curp address curp_clean
0 BOXW310820HNERXN09 123 Pine Ave. BOXW310820HNERXN09
1 BOXW310820HNERXN08 main st NaN
2 7542011030 1234 west main heights 57033 NaN
3 7552A10004 apt 1 789 s maple rd manhattan NaN
4 8019010008 robie house, 789 north main street NaN
5 hello 1111 S Figueroa St, Los Angeles, CA 90015 NaN
6 NaN (staples center) 1111 S Figueroa St, Los Angeles NaN
7 NULL hello NaN

compact

[4]:
clean_mx_curp(df, column = "curp", output_format="compact")
[4]:
curp address curp_clean
0 BOXW310820HNERXN09 123 Pine Ave. BOXW310820HNERXN09
1 BOXW310820HNERXN08 main st NaN
2 7542011030 1234 west main heights 57033 NaN
3 7552A10004 apt 1 789 s maple rd manhattan NaN
4 8019010008 robie house, 789 north main street NaN
5 hello 1111 S Figueroa St, Los Angeles, CA 90015 NaN
6 NaN (staples center) 1111 S Figueroa St, Los Angeles NaN
7 NULL hello NaN

birthdate

[5]:
clean_mx_curp(df, column = "curp", output_format="birthdate")
[5]:
curp address curp_clean
0 BOXW310820HNERXN09 123 Pine Ave. 1931-08-20
1 BOXW310820HNERXN08 main st NaN
2 7542011030 1234 west main heights 57033 NaN
3 7552A10004 apt 1 789 s maple rd manhattan NaN
4 8019010008 robie house, 789 north main street NaN
5 hello 1111 S Figueroa St, Los Angeles, CA 90015 NaN
6 NaN (staples center) 1111 S Figueroa St, Los Angeles NaN
7 NULL hello NaN

gender

[6]:
clean_mx_curp(df, column = "curp", output_format="gender")
[6]:
curp address curp_clean
0 BOXW310820HNERXN09 123 Pine Ave. M
1 BOXW310820HNERXN08 main st NaN
2 7542011030 1234 west main heights 57033 NaN
3 7552A10004 apt 1 789 s maple rd manhattan NaN
4 8019010008 robie house, 789 north main street NaN
5 hello 1111 S Figueroa St, Los Angeles, CA 90015 NaN
6 NaN (staples center) 1111 S Figueroa St, Los Angeles NaN
7 NULL hello NaN

3. inplace parameter

This deletes the given column from the returned DataFrame. A new column containing cleaned CURP strings is added with a title in the format "{original title}_clean".

[7]:
clean_mx_curp(df, column="curp", inplace=True)
[7]:
curp_clean address
0 BOXW310820HNERXN09 123 Pine Ave.
1 NaN main st
2 NaN 1234 west main heights 57033
3 NaN apt 1 789 s maple rd manhattan
4 NaN robie house, 789 north main street
5 NaN 1111 S Figueroa St, Los Angeles, CA 90015
6 NaN (staples center) 1111 S Figueroa St, Los Angeles
7 NaN hello

4. errors parameter

coerce (default)

[8]:
clean_mx_curp(df, "curp", errors="coerce")
[8]:
curp address curp_clean
0 BOXW310820HNERXN09 123 Pine Ave. BOXW310820HNERXN09
1 BOXW310820HNERXN08 main st NaN
2 7542011030 1234 west main heights 57033 NaN
3 7552A10004 apt 1 789 s maple rd manhattan NaN
4 8019010008 robie house, 789 north main street NaN
5 hello 1111 S Figueroa St, Los Angeles, CA 90015 NaN
6 NaN (staples center) 1111 S Figueroa St, Los Angeles NaN
7 NULL hello NaN

ignore

[9]:
clean_mx_curp(df, "curp", errors="ignore")
[9]:
curp address curp_clean
0 BOXW310820HNERXN09 123 Pine Ave. BOXW310820HNERXN09
1 BOXW310820HNERXN08 main st BOXW310820HNERXN08
2 7542011030 1234 west main heights 57033 7542011030
3 7552A10004 apt 1 789 s maple rd manhattan 7552A10004
4 8019010008 robie house, 789 north main street 8019010008
5 hello 1111 S Figueroa St, Los Angeles, CA 90015 hello
6 NaN (staples center) 1111 S Figueroa St, Los Angeles NaN
7 NULL hello NaN

4. validate_mx_curp()

validate_mx_curp() returns True when the input is a valid CURP. Otherwise it returns False.

The input of validate_mx_curp() can be a string, a Pandas DataSeries, a Dask DataSeries, a Pandas DataFrame and a dask DataFrame.

When the input is a string, a Pandas DataSeries or a Dask DataSeries, user doesn’t need to specify a column name to be validated.

When the input is a Pandas DataFrame or a dask DataFrame, user can both specify or not specify a column name to be validated. If user specify the column name, validate_mx_curp() only returns the validation result for the specified column. If user doesn’t specify the column name, validate_mx_curp() returns the validation result for the whole DataFrame.

[10]:
from dataprep.clean import validate_mx_curp
print(validate_mx_curp('BOXW310820HNERXN09'))
print(validate_mx_curp('BOXW310820HNERXN08'))
print(validate_mx_curp('7542011030'))
print(validate_mx_curp('7552A10004'))
print(validate_mx_curp('8019010008'))
print(validate_mx_curp("hello"))
print(validate_mx_curp(np.nan))
print(validate_mx_curp("NULL"))
True
False
False
False
False
False
False
False

Series

[11]:
validate_mx_curp(df["curp"])
[11]:
0     True
1    False
2    False
3    False
4    False
5    False
6    False
7    False
Name: curp, dtype: bool

DataFrame + Specify Column

[12]:
validate_mx_curp(df, column="curp")
[12]:
0     True
1    False
2    False
3    False
4    False
5    False
6    False
7    False
Name: curp, dtype: bool

Only DataFrame

[13]:
validate_mx_curp(df)
[13]:
curp address
0 True False
1 False False
2 False False
3 False False
4 False False
5 False False
6 False False
7 False False
[ ]: