pandas: Series, DataFrames & I/O. pandas is the standard Python library for data manipulation and analysis. A DataFrame is a table of labeled columns; a Series is a single labeled column. pandas is built on NumPy and int…
Readpandas: Indexing, Selection & GroupBy. Selection & Filtering. # Column selection df['name'] # Series df[['name', 'salary']] # DataFrame (list of columns) # Row selection by position (iloc) df.iloc[0] # first row as Serie…
Readpandas: Cleaning, Merging & Performance. Missing Data. # Detect missing values df.isnull() # boolean DataFrame df.isnull().sum() # count per column df.isnull().sum() / len(df) * 100 # % missing per column # Drop missing …
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