WebDec 25, 2024 · According to the documentation this is not true. Without a key, the merge is based on an intersection of all columns: --- on : label or list Column or index level names to join on. These must be found in both DataFrames. If on is None and not merging on indexes then this defaults to the intersection of the columns in both DataFrames.

python valueerror cannot merge a series without a name - 稀土掘金

WebJan 20, 2024 · Now let’s say you wanted to merge by adding Series object discount to DataFrame df. # Merge Series into DataFrame df2 = df. merge ( discount, left_index … Webreturn obj elif isinstance (obj, ABCSeries): if obj.name is None: raise ValueError ("Cannot merge a Series without a name") else: return obj.to_frame () else: raise TypeError ( f"Can only merge Series or DataFrame objects, a {type (obj)} was passed" ) def _items_overlap_with_suffix( left: Index, right: Index, suffixes: Suffixes ) -> tuple [Index, … north iowa fights mma

如何合并Series和DataFrame

WebPerform a merge for ordered data with optional filling/interpolation. Designed for ordered data like time series data. Optionally. perform group-wise merge (see examples). Field names to join on. Must be found in both DataFrames. Field names to join on in left DataFrame. Can be a vector or list of. WebJun 11, 2024 · You can use the following syntax to quickly merge two or more series together into a single pandas DataFrame: df = pd. concat ([series1, series2, ...], axis= 1) … WebRaise code return obj elif isinstance(obj, ABCSeries): if obj.name is None: raise ValueError("Cannot merge a Series without a name") else: return obj.to_frame() else: … north iowa for sale by owner