Typeerror: a Bytes-Like Object Is Required, Not 'Str' When Writing to a File in Python 3

TypeError: a bytes-like object is required, not 'str' when writing to a file in Python 3

You opened the file in binary mode:

with open(fname, 'rb') as f:

This means that all data read from the file is returned as bytes objects, not str. You cannot then use a string in a containment test:

if 'some-pattern' in tmp: continue

You'd have to use a bytes object to test against tmp instead:

if b'some-pattern' in tmp: continue

or open the file as a textfile instead by replacing the 'rb' mode with 'r'.

TypeError: a bytes-like object is required, not 'str' when I'm inputting command in console

This error is because python expects bytes not string to be sent via socket.

Hence you have to convert strings to bytes before sending that. you can use encode() to convert string to bytes and use decode() to convert bytes received into string.

I have updated your code, Please refer below, this should work fine.

import socket
HOST = '0.0.0.0'
PORT = 12345

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind((HOST, PORT))


server_socket.listen(5)
print("\n[*] Listening on port " +str(PORT)+ ", waiting for connexions. ")


client_socket, (client_ip, client_port) = server_socket.accept()
print("[*] Client " +client_ip+ " connected \n")


while True:
    try:
        command = input(client_ip+ ">")
        if(len(command.split()) != 0):
            client_socket.send(command.encode('utf-8')) #Encoding required here

        else:
            continue

    except(EOFError):
        print("Invalid input, type 'help' to get a list of implented commands. \n")

        continue

    if(command == "quit"):
        break


    data = client_socket.recv(1024)
    print(data.decode('utf-8') + "\n") #Decoding required here


client_socket.close()

TypeError: a bytes-like object is required, not 'str' when trying to write in csv file

The csv module is one of the pieces where the conversion Python2 -> Python3 is not really straightforward. The underlying file is expected to be opened as text and no longer as a binary file, but with empty end of lines.

So I would write:

with open('C:/path_to_csv_file/fold1_1.csv', 'w', newline='', encoding='utf-8') as csvfile:
    spamwriter = csv.writer(csvfile, delimiter=',', quotechar='|', quoting=csv.QUOTE_MINIMAL)
    for row, timeseq in izip(fold1, fold1_t):
        spamwriter.writerow([s +'#{}'.format(t) for s, t in izip(row, timeseq)])

The current error is caused by the csv module sending a unicode string while the undelying file expected bytes.

python ftplib TypeError: a bytes-like object is required, not 'str'

When you are opening f on line 107, try 'rb' instead of 'r'

That may be sufficient to do the trick.

For SFTP in the past, I've used paramiko. A code snip is below:

import paramiko

def sendFile(**kwargs):

    trans = paramiko.Transport(kwargs['host'], kwargs['port'])  
    trans.connect(username = kwargs['username'], password = kwargs['password'])
    conn = paramiko.SFTPClient.from_transport(trans)
    conn.put(sourceFile, destFile)  

I've severely redacted the above to get basics across.

(From experience) I'd recommend you do the following as part of a wider solution:

1. Copy your original source file and rename as a .partial file or similar (to prevent changes to source mid transfer)
2. Check remote (dest) area for existence of similar file before trying to copy, delete if its older or different size, abandon transfer if same
3. Transfer the .partial file
4. Check that the .partial file at dest is same as source (checksums)
   5a. If same, remove the .partial from destFile
   5b. If not same, repeat transfer
5. When transfer success, delete the .partial file from source area

TypeError: a bytes-like object is required, not 'str', for writing string to file

In your comment you said that you were opening the file as a bytes by using the argument wb however you're trying to write a string to the file which causes the error.

To fix that all you have to do is convert the string to bytes

for d in range(0,d2.size):
    c2 += str(d2.item(d))
    cf.write(bytes(chr(int(c2,2)), 'utf-8'))

TypeError a bytes-like object is required, not 'str' (Pydub)

Error message seems pretty straightforward : AudioSegment class constructor is expecting a bytes object and you are passing a String instead.

According to the pydub doc, you could simply call from_wav() method by passing your filepath as a string.

Example (from the doc) :

song = AudioSegment.from_wav("never_gonna_give_you_up.wav")

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