Teradata Package for Python Function Reference on VantageCloud Lake - translate - Teradata Package for Python - Look here for syntax, methods and examples for the functions included in the Teradata Package for Python.
Teradata® Package for Python Function Reference on VantageCloud Lake
- Deployment
- VantageCloud
- Edition
- Lake
- Product
- Teradata Package for Python
- Release Number
- 20.00.00.03
- Published
- December 2024
- Language
- English (United States)
- Last Update
- 2024-12-19
- dita:id
- TeradataPython_FxRef_Lake_2000
- Product Category
- Teradata Vantage
- teradataml.dataframe.sql.DataFrameColumn.translate = translate(expression, replace_string)
- DESCRIPTION:
Function returns values in column with every occurrence of each character in
"expression" replaced with the corresponding character in "replace_string".
If the first character in "expression" occurs in the values in column, all
occurrences of it are replaced by the first character in "replace_string". This
repeats for all characters in "expression" and for all characters in
"replace_string". The replacement is performed character-by-character, that is,
the replacement of the second character is done on the string resulting
from the replacement of the first character.
If "expression" contains more characters than "replace_string", the extra characters
are removed from the string values in column.
If "expression" contains fewer characters than "replace_string", the extra characters
in "replace_string" have no effect.
If the same character occurs more than once in "expression", only the replacement
character from the "replace_string" corresponding to the first occurrence is used.
ALTERNATE NAME:
otranslate
PARAMETERS:
expression:
Required Argument.
Specifies a ColumnExpression of a string column or a string literal
that will be replaced in string values in column.
If argument is NULL, the function returns string values in column.
Format of a ColumnExpression of a string column: '<dataframe>.<dataframe_column>'.
Supported column types: CHAR, VARCHAR
Types: ColumnExpression, str
replace_string:
Required Argument.
Specifies a ColumnExpression of a string column or a string literal
that replaces the characters specified by expression.
If argument is NULL or empty, the function removes the characters
specified in expression.
Format of a ColumnExpression of a string column: '<dataframe>.<dataframe_column>'.
Supported column types: CHAR, VARCHAR
Types: ColumnExpression, str
RAISES:
TypeError, ValueError, TeradataMlException
RETURNS:
DataFrameColumn
EXAMPLES:
# Load the data to run the example.
>>> load_example_data("dataframe", "admissions_train")
# Create a DataFrame on 'admissions_train' table.
>>> df = DataFrame("admissions_train").iloc[:4]
>>> print(df)
masters gpa stats programming admitted
id
3 no 3.70 Novice Beginner 1
4 yes 3.50 Beginner Novice 1
2 yes 3.76 Beginner Beginner 0
1 yes 3.95 Beginner Beginner 0
# Example 1: Replaces the occurrence of 'i' in the string in "stats" column by the
# character in to_string ('X') and pass it as input to DataFrame.assign().
>>> res = df.assign(col = df.stats.translate("i", "X"))
>>> print(res)
masters gpa stats programming admitted col
id
3 no 3.70 Novice Beginner 1 NovXce
4 yes 3.50 Beginner Novice 1 BegXnner
2 yes 3.76 Beginner Beginner 0 BegXnner
1 yes 3.95 Beginner Beginner 0 BegXnner
# Example 2: Executed translate() function on "stats" column and filtered computed
# values which are equal to 'BegXnner'.
>>> print(df[df.stats.translate("i", "X") == "BegXnner"])
masters gpa stats programming admitted
id
4 yes 3.50 Beginner Novice 1
2 yes 3.76 Beginner Beginner 0
1 yes 3.95 Beginner Beginner 0