Syntax for Creating DataFrames from

1. Lists
2. Dictionary
3. Series
4. nd.array

Syntax for Creating DataFrames from

1. Lists
2. Dictionary
3. Series
4. nd.array

Syntax for Creating DataFrames
pd.Dataframe

1. Lists
   pd.Dataframe{'columnName1':['val1','val2'], 'columnName2':[1,2]}
   
2. Dictionary
   pd.Dataframe{'columnName1':{key1:value1}, 'columnName2':[key2:val2]}
   
3. Series
   series1 = pd.Series([values],index=[indexes])
   series2 = pd.Series(....)
   #they have the same kind of indexes, eg by year.
   newDF = pd.Dataframe({'colName1':series1,'colName2':series2})
   
4. nd.array
   Create an ndarrays with years. np.array([2001,2020,2019])
   Create a dict with the ndarray. dict = {'year':np_arr}
   Pass this dict to a new DataFrame. df = pd.DataFrame(dict)
   #it will have an index sequenced, column name year, with the values in the np array