How to Read a Text File into a String Variable and Strip Newlines

How to read a text file into a string variable and strip newlines?

You could use:

with open('data.txt', 'r') as file:
    data = file.read().replace('\n', '')

Or if the file content is guaranteed to be one-line

with open('data.txt', 'r') as file:
    data = file.read().rstrip()

Python Removing [' '] from start and end of string when reading text from a file

It’s because readlines returns a list.

If your file contained multiple lines you would have many elements in the list. But as you only have one line it is the only element in the list.

Check the IO documentation for other methods to read single lines.

How to read a text file that can be any length into separate string and integer variables in python?

Your example does not really make sense. But, if that is what you are looking for:

def conv(s):
    try:
        return ('int', int(s))
    except ValueError:
        return ('str', f"'{s}'")
    
cnt={}
with open('/tmp/file') as f:
    for line in f:
        for s in line.split():
            t=conv(s)
            cnt[t[0]]=cnt.get(t[0], 0)+1
            print(f'{t[0]}{cnt[t[0]]} = {t[0]}({t[1]})')

Prints:

str1 = str('Start')
int1 = int(111)
int2 = int(139)
str2 = str('A')
int3 = int(122)
int4 = int(155)
str3 = str('B')
int5 = int(133)
int6 = int(217)
str4 = str('C')
int7 = int(144)
int8 = int(223)
str5 = str('Finish')

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DON'T try and make variables out of these! Instead, use a dict like so:

def conv(s):
    try:
        return ('int', int(s))
    except ValueError:
        return ('str', f"'{s}'")

cnt={}
data={}
with open('/tmp/file') as f:
    for line in f:
        for s in line.split():
            t=conv(s)
            cnt[t[0]]=cnt.get(t[0], 0)+1
            data[f'{t[0]}{cnt[t[0]]}'] = t[1]

>>> data
{'str1': "'Start'", 'int1': 111, 'int2': 139, 'str2': "'A'", 'int3': 122, 'int4': 155, 'str3': "'B'", 'int5': 133, 'int6': 217, 'str4': "'C'", 'int7': 144, 'int8': 223, 'str5': "'Finish'"}

Read file into list and strip newlines

file.read() reads entire file's contents, unless you specify max length. What you must be meaning is .readlines(). But you can go even more idiomatic with a list comprehension:

with open('drugs') as temp_file:
  drugs = [line.rstrip('\n') for line in temp_file]

The with statement will take care of closing the file.

Removing newline at the end of a variable read from .txt file

Instead of writing it straight away to the file, how about first saving it in variables first and writing it at once.You can do it like this,

for line in search_file:
    if search_registration in line:
        str1 = line;
for line in search_av_speed_file:
    if search_registration in line:
         current_line = line.split(",")
         speed_of_car = current_line[2]
         print(speed_of_car)
         str2 = speed_of_car
fstr=" ".join(str1,str2) #further formatting can be done here,like strip() and you can print this to see the desired result
fine_file.write(fstr)

In this way it will be much easier to format the strings as you want.

read and get specific int line of the text file into variable on python

You can simply iterate through the lines, and assign the line to a previous created string variable, if the condition is met, that the string occurs in a line of the file:

a_file = open('file.txt')
string = 'a word'
res_line = ""

for line in a_file:
    if string in line:
        res_line = line

print(res_line)

a_file.close()

you could also create a list which contains every line in that the string occurs:

a_file = open('file.txt')
string = 'a word'

res = [line for line in a_file if string in line]
print(res)

a_file.close()

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