Replace floats with ints in text files

Wessowang :

I want to find and replace floats with integers in several text files.
There is one float value per text file which I want to convert. It is always after a specific keyword and has to be multiplied by 10.000.
e.g. the float 1.5 should be turned into the integer 15.000
The other floats after 1.5 don't have to be changed though

def edit(file):
    with open(file, 'r') as f:
        filedata = f.read()
        for line in filedata:
           if "keyword" in line:
              filedata = filedata.replace(re.search(r"\d+\.\d+", line).group(), str(10000*re.search(r"\d+\.\d+", line).group()))
    with open(file, 'w') as f:
        f.write(filedata)

I was trying to replace the the float using a regex. But this doesn't work

EXAMPLE FILE EXTRACT

abcdef 178 211 208 220    
ghijkl 0 0 0 0  
keyword 1.50 1.63 1.56 1.45

phoenixo :

You can iterate over lines with lines = filedata.split("\n"). Be careful because filedata is a big string containing the whole file. When you did for line in filedata, you iterated over every character of the file...

I also used another way (without regex) to find numbers and change them.

def edit(file):
    f = open(file, "r")
    filedata = f.read()
    lines = filedata.split("\n") # list of lines
    for index, line in enumerate(lines):
        if "keyword" in line:
            words = line.split() # ['keyword', '1.50', '1.63', '1.56', '1.45']
            for i, w in enumerate(words):
                try:
                    # transform number to float, multiply by 10000
                    # then transform to integer, then back to string
                    new_word = str(int(float(w)*10000))
                    words[i] = new_word
                except:
                    pass
            lines[index] = " ".join(words)
    new_data = "\n".join(lines) # store new data to overwrite file
    f.close()

    # open file with write permission
    f = open(file, "w")

    # overwrite the file with our modified data
    f.write(new_data)
    f.close()

edit("myfile.txt")

Output :

# myfile.txt
abcdef 178 211 208 220    
ghijkl 0 0 0 0  
keyword 15000 16299 15600 14500