Adding source code files for Chapter 6

Chapter6/mypandas/advance/pandastrick1.py

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+# pandastrick1.py
+import pandas as pd
+
+weekly_data = {'day':['Monday','Tuesday', 'Wednesday', 'Thursday',
+                      'Friday', 'Saturday', 'Sunday'],
+                'temp':[40, 33, 42, 31, 41, 40, 30],
+                'condition':['Sunny','Cloudy','Sunny','Rainy','Sunny',
+                        'Cloudy','Rainy']
+        }
+df = pd.DataFrame(weekly_data)
+
+#Replacing a numeric value of 40 with 39 across DF
+df.replace(40,39, inplace=True)
+
+#Replacing string Sunny with Sun across DF
+df.replace("Sunny","Sun",inplace=True)
+
+#Replacing strings starting with Cl with Cloud across DF
+df.replace(to_replace="^Cl.*",value="Cloud", inplace=True,regex=True)
+
+#Replacing Day names using a list across DF
+df.replace(["Monday","Tuesday"],["monday","tuesday"], inplace=True)
+
+#Replacing Day names using a single dict across DF
+df.replace({"Wednesday":"wednesday","Thursday":"thursday"}, inplace=True)
+
+#Replacing Day names using dict for column and value
+df.replace({"day":"Friday"}, {"day":"friday"}, inplace=True)
+
+#Replacing name of two days using dicts for column day
+df.replace({"day":{"Saturday":"saturday", "Sunday":"sunday"},
+            "condition":{"Rainy":"Rain"}}, inplace=True)
+print(df)