convert all columns to float pandas

1df["data"] = df["data"].astype(float)
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1df["col"] = df["col"].astype(float)
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1You have four main options for converting types in pandas:
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3to_numeric() - provides functionality to safely convert non-numeric types (e.g. strings) to a suitable numeric type. (See also to_datetime() and to_timedelta().)
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5astype() - convert (almost) any type to (almost) any other type (even if it's not necessarily sensible to do so). Also allows you to convert to categorial types (very useful).
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7infer_objects() - a utility method to convert object columns holding Python objects to a pandas type if possible.
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9convert_dtypes() - convert DataFrame columns to the "best possible" dtype that supports pd.NA (pandas' object to indicate a missing value).
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11Read on for more detailed explanations and usage of each of these methods.