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Python concatenate text files
I have a list of 20 file names, like ['file1.txt', 'file2.txt', ...] . I want to write a Python script to concatenate these files into a new file. I could open each file by f = open(...) , read line by line by calling f.readline() , and write each line into that new file. It doesn't seem very "el...
Only read selected columns
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Say the data are in file data.txt, you can use the colClasses argument of read.table() to skip columns. Here the data in the first 7 columns are "integer" and we set the remaining 6 columns to "NULL" indicating they should be skipped
> read.table("dat...
Different ways of loading a file as an InputStream
...ing it from. For example calling, String.class.getResourceAsStream("myfile.txt") will look for a file in your classpath at the following location: "java/lang/myfile.txt". If your path starts with a /, then it will be considered an absolute path, and will start searching from the root of the classpat...
How do you run a command for each line of a file?
... you could use shell command line expansion. Simply:
chmod 755 $(<file.txt)
For small amount of files (lines), this command is the lighter one.
xargs is the right tool
For bigger amount of files, or almost any number of lines in your input file...
For many binutils tools, like chown, chmod, ...
How to capture Curl output to a file?
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curl -K myconfig.txt -o output.txt
Writes the first output received in the file you specify (overwrites if an old one exists).
curl -K myconfig.txt >> output.txt
Appends all output you receive to the specified file.
Note: The -K ...
How do I rename the extension for a bunch of files?
...ctory, I have a bunch of *.html files. I'd like to rename them all to *.txt
24 Answers
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Copying files from Docker container to host
...e - <<EOF
> FROM busybox
> WORKDIR /workdir
> RUN touch foo.txt bar.txt qux.txt
> EOF
Sending build context to Docker daemon 2.048kB
Step 1/3 : FROM busybox
---> 00f017a8c2a6
Step 2/3 : WORKDIR /workdir
---> Using cache
---> 36151d97f2c9
Step 3/3 : RUN touch foo.txt ba...
Load data from txt with pandas
I am loading a txt file containig a mix of float and string data. I want to store them in an array where I can access each element. Now I am just doing
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Writing a dict to txt file and reading it back?
I am trying to write a dictionary to a txt file. Then read the dict values by typing the keys with raw_input . I feel like I am just missing one step but I have been looking for a while now.
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How to create empty text file from a batch file?
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echo. 2>EmptyFile.txt
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