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Python Lib (:moneybag:logging (:pencil2:实现 (:warning:实现控制台…

Python Lib

- - - - sys.stdout.write('\rxxxx') # sys.stdout.flush()
      - for i in range(1000000): print('\rprogress:%d%%'%(i),end="")
    - - for i in range(1000000): sys.stdout.write('\r ') sys.stdout.write('\r*********')
- - - - import sys sys.path.insert(1,'./dir1') import xxx # xxx.py in the dir1

:moneybag:captcha

'''generate a captchaes'''
import random
import os
from captcha.image import ImageCaptcha

'''generating list'''
digits=['0','1','2','3','4','5','6','7','8','9']
'''generate a text with four digits'''
def gen_random_text(field=digits,size=4):
    # create a list
    res=[]
    # for _ in size:
    for _ in range(size):
    #   append to the list
        digit=random.choice(digits)
        res.append(digit)
    # return the list
    return res

'''create an image'''
image=ImageCaptcha()
captcha_txt=''.join(gen_random_text())
image_data=image.generate(captcha_txt)
'''store the image'''
# dest dir
captcha_dir='captcha'

# check dir
if not os.path.exists(captcha_dir):
    os.makedirs(captcha_dir)

filename=captcha_txt+'.png'
image.write(captcha_txt,os.path.join(captcha_dir,filename))

:star:

'''generate a captchaes'''
from captcha.image import ImageCaptcha

'''create an image'''
image=ImageCaptcha()
image_data=image.generate('1234')
'''store the image'''
image.write('1234','1234.png')

:moneybag:logging

python logging模块使用教程

:pencil2:输出到logger.log文件中

#!/usr/local/bin/python
# -*- coding:utf-8 -*-
import logging

# 通过下面的方式进行简单配置输出方式与日志级别
logging.basicConfig(filename='logger.log', level=logging.INFO)

logging.debug('debug message')
logging.info('info message')
logging.warn('warn message')
logging.error('error message')
logging.critical('critical message')

:pencil2:实现

import logging

# create logger
# create a handler 
# create a formatter
# add the formatter to the handler
# add the handler to the formatter
# use the logger to record message

log_name="orris_log"
logger=logging.getLogger(log_name)
logger.setLevel(logging.DEBUG)

handler_path="mylog.log"
fh=logging.FileHandler(handler_path)
fh.setLevel(logging.DEBUG)


fmt="%(asctime)s %(levelname)s %(filename)s %(lineno)d %(process)d %(message)s"
datefmt="%Y %B %d %H %M %S"
formatter=logging.Formatter(fmt,datefmt)

fh.setFormatter(formatter)
logger.addHandler(fh)

logger.debug('debug message')
logger.info('info message')
logger.warn('warn message')
logger.error('error message')
logger.critical('critical message')

:moneybag:ctypes

:moneybag:具体实现步骤

1. 用C语言写一个函数f,文件为print.c
2. 编译成库 gcc print.c -shared -o print.so
3. 写python函数,导入ctypes库 import ctypes
4. 打开刚才的库 lib=ctypes.cdll.LoadLibrary('./print.so')
5. 使用里面的函数 lib.f()

:moneybag:pandas

:pencil2:打开+查看

import pandas as pd
import os

data_dir='kaggle-data'
df_train=pd.read_csv(os.path.join(data_dir,'train.csv'),encoding='ISO-8859-1')
df_test=pd.read_csv(os.path.join(data_dir,'test.csv'),encoding='ISO-8859-1')
df_desc=pd.read_csv(os.path.join(data_dir,'product_descriptions.csv'))

print(df_train.head())

- - - - :pencil2:利用自己来更新自己
        
        df_all['search_term']=df_all['search_term'].map(lambda x:tokenize_string(x))
    - - :check:新增该属性
  - - - a['new_id']=a.apply(lambda x:x['id']+1,axis=1)
      - :warning:axis=1
  - - - df_all=df_all.drop(['search_term','product_title','product_description'],axis=1)
  - - - y_train=df_train['relevance'].values
- - - - df = df.loc[0:2, ['A', 'C']]
  - - - df = df.iloc[0:2, [0, 2]]