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# Getting the length of the longest string in a column in Pandas DataFrame

schedule Aug 12, 2023
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local_offer
PythonPandas
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Consider the following DataFrame:

``` df = pd.DataFrame({"A":["a","abc","def"]})df A0 a1 abc2 def ```

# Solution

To get the length of the longest string in `df`:

``` df["A"].str.len().max() 3 ```

# Explanation

We first obtain the length of each string in column `A`:

``` df["A"].str.len() 0 11 32 3Name: A, dtype: int64 ```

Next, we use Series's `max()` method to get largest value:

``` df["A"].str.len().max() 3 ```
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