python 处理dataframe中的时间字段方法

doc_list1 = []
for i in doc1.iloc[:,1:2].values.tolist():        # 转换成了时间戳格式
  for j in i:
    dt = time.strptime(j, "%Y-%m-%d %H:%M:%S")
    dt_new = time.mktime(dt)
    doc_list1.append(dt_new)

doc_list2 = []
for i in doc_list1:
  time_local = time.localtime(i)
  dt = time.strftime("%Y-%m-%d %H:%M:%S",time_local)
  dt1 = datetime.datetime.strptime(dt, "%Y-%m-%d %H:%M:%S")
  doc_list2.append(dt1)

X1 = np.mat(doc_list1).T
y1= test_target1001
clf = AdaBoostRegressor(DecisionTreeRegressor(max_depth=5),n_estimators=1000, random_state=rng)
clf.fit(X1,y1)
yhat1 = clf.predict(X1)

value = result.iloc[:,1]
list = []
for i in value:
    print(type(i.to_pydatetime().timetuple()),i)
    list.append(time.mktime(i.to_datetime().timetuple()))
print(list)