How to read text from a file using Python?

Question

I have some header files in C that I want to read in Python. Is there a way to do this? For example, if I have a header file that contains the following code in C:

#define x 0x00
#define y 0x03
#define z 0x0003

Would I be able to extract this data using Python?

So, you just want to read the raw text from the .h files? If so, there is no difference in reading a .h from a .txt or whatever. Just reading text from a file. If you want to actually parse the code or do some kind of C interop from Python, the procedure is a bit different! — Sederqvist
– Sederqvist, Commented Jun 24, 2021 at 1:01
I don't get what you're trying to do here. You mean you want to get back a mapping as in converting hex numbers? Is it ntohs(0x0003) as in Capture all packets in some socket protocol? Is it the Nvidia GeForce error codes or what?? More info needed. — Sederqvist
– Sederqvist, Commented Jun 24, 2021 at 1:55

chepner · Accepted Answer · 2021-06-24 01:35:07Z

1

data = dict()
with open("file.h", "r") as f:
    for l in f:
        l = l.split(" ")
        data[l[1]] = l[2]

edited Jun 24, 2021 at 1:35

chepner

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answered Jun 24, 2021 at 0:39

TheEagle

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3 Comments

Sederqvist Over a year ago

Many ways to achieve that. Easiest is probably using a full path in the first argument to open(), like open('/path/to/file/here.h', 'r').

Sederqvist Over a year ago

If you use the code from @Programmer the text from the file is read into a dict structure, so you'd have to traverse the dict to get to the text elements. It isn't supposed to "open" an application containing the text / document, if that's what you mean?

Sederqvist Over a year ago

If that is what you want, then a dirty trick to open the system defined app for the given file-type could be: import webbrowser webbrowser.open('/path/to/file.txt')

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