在插入新列时，Pandas正在将datetime列表覆盖到timestamp中

Question

我有一个要添加到panda中的列的datetime值列表。但是，每当我将其添加为列时，值都会更改为time stamp类型。如何获取它，以便将该列及其值保留为datetime类型？你知道吗

Code: 
#partialDates is a datetime list
#partialddf is a panda dataframe

print 'Type as an independent list:'
print type(partialDates[0]) 
partialddf['A'] = partialDates
print 'Type once inside panda as a colum:'
print type(partialddf['A'].tolist()[0])





Output:
Type as an independent list:
<type 'datetime.datetime'>
Type once inside panda as a colum:
<class 'pandas._libs.tslib.Timestamp'>