Answers

answers7REAL.txt

@@ -0,0 +1,27 @@
+#1
+>>> import pandas as cd
+>>> irisdata=cd.read_csv('iris.csv')
+>>> def custom_function():
+...     iris_1=irisdata.iloc[1:150,:]
+...     iris_2=iris_1.iloc[::2]
+...     return iris_2
+>>> print(custom_function())
+
+#2
+
+#return the number of observations for a given species included in the data set
+>>> def custom_function():
+...     data=pd.read_csv("iris.csv")
+...     return (data['Species'].value_counts())
+
+#return a dataframe for flowers with Sepal.Width greater than a value specified by the function user
+>>> def custom_function(x):
+...     return data.loc[data['Sepal.Width']>x]
+
+#write the data for a given species to a comma-delimited file with the given species name as the file name
+import pandas
+data=pandas.read_csv("iris.csv")
+def custom_function(x):
+        y=data.loc[data['Species']==x]
+        y.to_csv('%s.csv' % x)
+print(custom_function('setosa'))