Using chunk size issue - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: General Coding Help (https://python-forum.io/forum-8.html) +--- Thread: Using chunk size issue (/thread-16299.html) |
Using chunk size issue - sandy - Feb-21-2019 Hi , My inputs query_string= sel * from table ( 340k rows) I am using df = pd.read_sql(query_string ,conn_bmg,chunksize=50000)and working on using this code total=0 for each in df: df1= each[each.Column.str.contains("VENMO")] df1['column']='VENMO' df1.to_csv(r"C:\Users\xxxx\Desktop\venmo_output8.CSV", index=False)I need to get 340k rows.. since all 340k rows have VENMO. BUt I am getting only 27k rows. I don't know why. Do I am using any thing wrong in code? RE: Using chunk size issue - sandy - Feb-25-2019 Any help on this? |