#HOW TO SEARCH MULTIPLE FILES AT ONCE CODE#
#HOW TO SEARCH MULTIPLE FILES AT ONCE SERIES#

Also, the filehandle.close() command is very important. Without it, the text in our file would just be all smushed together on one line. In the file writing line, notice the at the end of the line. Open it in a text editor and look at the file.

#HOW TO SEARCH MULTIPLE FILES AT ONCE CODE#

close ()Īfter you run this command, look in the directory where you ran your code and find the “energies.txt” file. split () energy = float ( words ) datafile. close () # Loop through the dataįor line in data : if 'Final Energy' in line : energy_line = line words = energy_line. Outfile = open ( f, 'r' ) data = outfile. split ( '.' ) molecule_name = split_filename # Read the data basename ( f ) split_filename = file_name. In generalĭatafile = open ( 'energies.txt', 'w+' ) #This opens the file for writingįor f in filenames : # Get the molecule nameįile_name = os. To use a function that is in a library, you often use the dot notation introduced in the previous lesson. Usually a function has some type of input and gives a particular output.

Within a library there are modules and functions which do a specific computational task. In this lesson, we will be using the glob library, which will help us read in multiple files from our computer. In the last lesson, we imported os.path, which was a module that handled filepaths for us. Using libraries and in Python reduces the amount of code you have to write. The functions within a library or module are usually related to one another. A library is a set of modules which contain functions. To analyze multiple files, we will need to import a python library. Make sure the folder is in the same directory as the directory where you are writing and executing your code. The output files are all saved in a folder called outfiles that you should have downloaded in the setup for this lesson.

#HOW TO SEARCH MULTIPLE FILES AT ONCE SERIES#

In this example, we are going to parse the output files for a whole series of aliphatic alcohol compounds and parse the energy value for each one. One of the real powers of writing a program to analyze your data is that you can just as easily analyze 100 files as 1 file. But what if you had 100 files to analyze? What if you had 1000? In such a case the cutting and pasting method would be very tedious and time consuming. If you only have 1 or 2 files, this might be a very reasonable thing to do. While you might have seen the utility of doing such a thing, you might have also wondered why we didn’t just search the file and cut and paste the values we wanted into a spreadsheet. In our previous lesson, we parsed values from output files.

How to search multiple files at once