drbinzhao的专栏

os.path.join() 函数用于路径拼接文件路径，可以传入多个参数。import osprint os.path.join('111','222','333') #111/222/333print os.path.join('/111','222','333') #/111/222/333print os.path.join('/111','/222','333') #/222/333print os.path.join('/111','/222','/333') #/333

import timedef timestamp_datetime(value): format = ‘%Y-%m-%d %H:%M:%S’ # value为传入的值为时间戳(整形)，如：1332888820 value = time.localtime(value) ## 经过localtime转换后变成 ## time.struct_time(t

In [3]: import pandas as pdIn [4]: a = pd.Series([1,2,3])In [5]: b = pd.Series([2,3,4])In [6]: c = pd.DataFrame([a,b])In [7]: c Out[7]: 0 1 2 0 1 2 3 1 2 3 4 不过pandas直接用列表生成dataframe只能按

(1)mysql 32位 anaconda 32tusharecd tushare filefolder python setup.py installhttp://sourceforge.net/projects/mysql-python/(2) import tushare as ts adata=ts.get_hist_data(‘600292’,ktype=’30’)

from pandas import Series, DataFramecol = [‘a’,’b’,’c’]data = DataFrame([[1,2,3],[10,11,12],[20,21,22]],columns=col)data Out[34]: a b c 0 1 2 3 1 10 11 12 2 20 21 22 自动加index

!pip install XXX

ImportError: No module named cv2第一想法：使用命令：pip install cv2会报错找不到请求的版本解决方法：使用命令pip install opencv-python

pip install jupyter notebook --user