console 输入txt
#利用输出重定向输出两次
#同样输出程序path和文件名
import os
importsys
temp=sys.stdout# 记录当前输出指向，默认是consle
withopen("outputlog.txt","a+") as f:
sys.stdout=f # 输出指向txt文 print("filepath:",__file__,"\nfilename:",os.path.basename(__file__))
print("some other information")
print("some other")
print("information")
sys.stdout=temp# 输出重定向回consle
print(f.readlines())# 将记录在文件中的结果输出到屏幕
pandas 索引列互相转换
# 列 ——> 索引
df.set_index('date')
df.set_index('date', inplace=True)# column 改为 index
#索引 ——> 列
df['index'] = df.index
df.reset_index(level=0, inplace=True)
df.reset_index(level=['tick', 'obs'])
df['si_name'] = df.index.get_level_values('si_name') # where si_name is the name of the subindex.
df.reset_index()# （all）index 改为 column
#df.reset_index(level=0, inplace=True) # （the first）index 改为 column
中文路径乱码问题：
data_dir = 'D:\百分点工作资料\PHM技术资料\_871PHM_贝晓强\871PHM\871PHM\data_dictionary\data1.csv'
strPath = data_dir.decode('utf-8')
- initialize many lists:
# wrong:
x = y = z = []
# right:
alist, blist, clist, dlist, elist = ([] for i in range(5))
do not show the figure
import matplotlib.pyplot as plt
# Turn interactive plotting off
plt.ioff()
注释 ctrl /
整段注释不支持？
continue语句跳出本次循环，而break跳出整个循环
安装某些包:
sudo apt-get install python3-tk
import tkinter
-定义的函数之间要隔开两行
range(start, stop, step)
-替换：Ctrl+R.
- 删除当前行 >CTRY Y
ALT F7: 查找哪些地方使用了选中的方法。
ALT UP: 移到上一个方法.
ALT DOWN: 移到下一个方法.
CTRL SHIFT UP: 将当前行上移一行.
CTRL SHIFT UP: 将当前行下移一行.
Alt+Enter 自动添加包
see the modules in the terminal (Python3):
sudo apt-get install python-pip3
pip3 freeze
pip3 freeze | grep feed
will list all packages about "feed'
update python 3.4 to python 3.6 in ubuntu 14.04:
< http://devopspy.com/python/install-python-3-6-ubuntu-lts/>
#optional
sudo apt-get update
sudo apt-get install build-essential libpq-dev libssl-dev openssl libffi-dev zlib1g-dev
sudo apt-get install python3-pip python3-dev
# adding from PPA
sudo add-apt-repository ppa:jonathonf/python-3.6
sudo apt-get update
sudo apt-get install python3.6
error in import matplotlib:
# in terminal
sudo apt-get install python3-tk
# in IDE:
import tkinter