dtoolkit.accessor.series.eval#
- dtoolkit.accessor.series.eval(s: Series, /, expr: str, **kwargs)[source]#
Evaluate a string describing operations on Series.
This allows
eval
to run arbitrary code, which can make you vulnerable to code injection if you pass user input to this function.- Parameters:
- exprstr
The expression string to evaluate.
- **kwargs
See the documentation for
pandas.eval()
for complete details on the keyword arguments.
- Returns:
- ndarray, scalar, pandas object
See also
pandas.eval
Evaluate a Python expression as a string using various backends.
pandas.DataFrame.eval
Evaluate a string describing operations on DataFrame columns.
dtoolkit.accessor.series.query
Evaluates a boolean expression to query Series.
Examples
>>> import dtoolkit >>> import pandas as pd
The
name
should be set.>>> s = pd.Series([1, 2, 3], index=["a", "b", "c"], name="col") >>> s a 1 b 2 c 3 Name: col, dtype: int64 >>> s.eval("col - 1") a 0 b 1 c 2 Name: col, dtype: int64 >>> s.eval("d = 4") a 1 b 2 c 3 d 4 Name: col, dtype: int64 >>> s.eval("col == 1") a True b False c False Name: col, dtype: bool >>> s.eval("index == 'c'") a False b False c True dtype: bool