Added pandas function to move data

home/public/snippits/pandas/move_rows.py

@@ -0,0 +1,31 @@
+# Move rows from one dataframe to another
+
+import pandas as pd
+
+data = {'Name':['Tom', 'nick', 'krish', 'jack'], 'Age':[20, 21, 19, 18]}
+df = pd.DataFrame(data)
+
+df_from = df.copy()
+df_to = pd.DataFrame()
+
+def move(a,b,cond):
+
+    rows = a.loc[cond, :]
+
+    # b.append acts like pass-by-value, parent not affected
+    b = b.append(rows, ignore_index=True)
+
+    # a.drop acts like pass-by-reference, parent affected
+    a.drop(rows.index, inplace=True)
+    return b
+
+    # return local copy so it can be assigned in parent
+    return(b)
+
+df_to = move(df_from,df_to,df_from.Name == "Tom")
+df_to = move(df_from,df_to,df_from.Name == "nick")
+print("AFTER")
+print(f"df_from is {df_from}")
+print(f"df_to is {df_to}")
+print()
+