In addition to Weibo, there is also WeChat
Please pay attention
WeChat public account
Shulou
2025-03-31 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >
Share
Shulou(Shulou.com)06/01 Report--
This article mainly explains the "python file stream reading and writing how to operate", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in-depth, together to study and learn "python file stream reading and writing how to operate" it!
The read and write of the file stream reads the txt file that saves the data as an array
Use try for exception discovery and use while to detect the end of the file for reading
File_to_read = raw_input ("Enter file name of tests (empty string to end program):") try: infile = open (file_to_read,'r') while file_to_read! = "": file_to_write = raw_input ("Enter output file name (.csv will be appended to it):") file_to_write = file_to_write + ".csv" outfile = open (file_to_write "w") readings = (infile.readline ()) print readings while readings! = 0: global count readings = int (readings) minimum = (infile.readline ()) maximum = (infile.readline ())
Use for to traverse each row read for one-time read and input
The data read by the program called below is
Result = list () with open ('.. / test/parameter.txt') as f: for line in f.readlines (): temp = list () # iterate through each row of elements one by one Convert it to the corresponding data b = line.strip (",] ["). Split (',') if (len (b) > = 5): b.pop () for an in b: a = a.replace ('[,') .replace (']' '') temp.append (float (a)) result.append (temp) # print ("temp printed midway is", temp) # print ("result added to result is", result) deletes specific characters in str
Delete the redundant string strip () at the beginning and end of the string
# remove redundant characters from the string def string_remove (): str1 = 'abc' print str1.strip () # abc str2 ='- abcdf++++' print str2.strip ('- +') # abcdf
The replace function, which deletes all strings in a string
Ss = 'old old string'ret = ss.replace (' old', 'new', 1) print (ret)
Sub function, which deletes multiple strings at the same time, where regular expressions are used
Str2 = 'abcwrt22666' # Delete all the strings, import reprint (re.sub ('[]','', str2)) # abcwrt22666 Thank you for your reading. The above is the content of "how to read and write python Files". After the study of this article, I believe you have a deeper understanding of how to read and write python files. The specific use situation still needs to be verified by practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!
Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.
Views: 0
*The comments in the above article only represent the author's personal views and do not represent the views and positions of this website. If you have more insights, please feel free to contribute and share.
Continue with the installation of the previous hadoop.First, install zookooper1. Decompress zookoope
"Every 5-10 years, there's a rare product, a really special, very unusual product that's the most un
© 2024 shulou.com SLNews company. All rights reserved.