Write newline value to python file without it making a new line

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I have a bit of an odd question but I'm trying to fix an issue I've been having. I have a python script that writes another stored python script to a new file. Problem is the script that it writes contains newline values (\n.) Instead of writing \n, it puts it in a new line. Any way around this?

f = open('email.py','r+')
readcontent = f.read()
f.seek(0, 0)
f.write('''\
def sendemail(from_addr, to_addr_list, cc_addr_list, subject, message, login, password, smtpserver='smtp.gmail.com:587'):
    header  = 'From: %s\n' % from_addr
    header += 'To: %s\n' % ','.join(to_addr_list)
    header += 'Cc: %s\n' % ','.join(cc_addr_list)
    header += 'Subject: %s\n' % subject
    message = header + message

    server = smtplib.SMTP(smtpserver)
    server.starttls()
    server.login(login,password)
    problems = server.sendmail(from_addr, to_addr_list, message)
    server.quit()
''')    
f.close()

I tried this but it didn't work:

f = open('email.py','r+',newline=None)

Any suggestions?


If you don't want Python to process backslash escapes in a string literal, prefix it with r:

f.write(r'''
...
''')

Python write newline without \n, To clarify, text files contain sequences of characters. The only way to So you can write without newlines, but your file will be one loooong line. 💡 Tip: Notice that only the last line of the file doesn't end with a new line character. 🔸 In Summary. The new line character in Python is . It is used to indicate the end of a line of text. You can print strings without adding a new line with end = <character>, which <character> is the character that will be used to separate the lines.


Try escaping your backslashes. Right now your backslashes escape the "n" characters so that it's interpreted as a newline. You want to escape that whole thing again so what you get is for instance:

    header  = 'From: %s\\n' % from_addr

Python Print Without Newline: Step-by-Step Guide, Printing without a new line is simple in Python 3. In order to print without newline in Python, you need to add an extra argument to your print  Or there may be another reason for making you believe that the f.write() adds the . You may have obtained your lst via fin.readline() where fin is the text file opened for reading. When reading text files in Python, you get the lines that contain also the final .


Try to replace \n to \\n

f = open('email.py','r+')
readcontent = f.read()
f.seek(0, 0)
f.write('''\
def sendemail(from_addr, to_addr_list, cc_addr_list, subject, message, login, password, smtpserver='smtp.gmail.com:587'):
    header  = 'From: %s\n' % from_addr
    header += 'To: %s\n' % ','.join(to_addr_list)
    header += 'Cc: %s\n' % ','.join(cc_addr_list)
    header += 'Subject: %s\n' % subject
    message = header + message

    server = smtplib.SMTP(smtpserver)
    server.starttls()
    server.login(login,password)
    problems = server.sendmail(from_addr, to_addr_list, message)
    server.quit()
'''.replace('\n', '\\n'))    
f.close()

How to separate strings when writing a file in Python, without adding , Originally Answered: How do I add a new line in a string in python? The default value of “end” argument is a newline (\n), but you can modify that Purpose-built for DevOps, F5 essential app protect service makes app security super simple. The following screenshot shows the text file output of the above python code, making use of new character to print text in new lines of the file created. Similarly, you can specify the newline character in a single line as well. f = open ("file.txt", "w") f.write ("Line 1 Content\nLine 2 Content\nLine 3 Content")


Python: How to Print Without Newline? (The Idiomatic Way), One of the first programs that you write when you start learning any new programming language no newlines but a space will be printed out print "Hello World! Append a text to file in Python using ‘with open’ statement. We can open the file in append access mode i.e. ‘a’, using ‘with open’ statement too, and then we can append the text at the end of the file.


Automate the Boring Stuff with Python, You can extract partial strings from string values, add or remove spacing, Any quotes, tabs, or newlines in between the “triple quotes” are considered part of the string. Python's indentation rules for blocks do not apply to lines inside a multiline a new file editor window and enter this program, saving it as validateInput.py:. How to print without newline or add space in Python3 and Python2. Python by default prints every output on a different line. In order to print different outputs in the same line, you have to introduce certain changes in the print command.


7.7. textwrap — Text wrapping and filling, Returns a list of output lines, without final newlines. Optional Both wrap() and fill() work by creating a TextWrapper instance and calling a single method on it. Generally people switching from C/C++ to Python wonder how to print two or more variables or statements without going into a new line in python. Since the python print() function by default ends with newline. Python has a predefined format if you use print(a_variable) then it will go to next line automatically. For examples: