CODEWITHSUNDEEP
python
notsolowki
notsolowki

Reputation: 107

Python Using Socket File Transfer

i have a small program for receiving a txt file from an arduino. the problem is sometimes it prints an empty file. i assume because the receiving part of the code is empty at the time. can someone help me make this code not write to the file when "t" is empty so i can prevent it from writing a blank txt file? thanks

with open('sensData.txt','wb') as f:
while True:
 t = conn.recv(20)
 print t
 if not t:
    s.close()
    break
 f.write(t) #Write To File UNLESS BLANK

Upvotes: 2

Views: 53

Answers (2)

user5308730
user5308730

Reputation: 

if t != "":
    f.write(t)

if t is empty, this should work

Upvotes: 0

toheedNiaz
toheedNiaz

Reputation: 1445

you need to try this :

  with open('sensData.txt','wb') as f:
    while True:
     t = conn.recv(1)
     print t
     if t =='':
        s.close()
        break
     f.write(t)

or you can populate a string and write it at once at the end of the loop

  with open('sensData.txt','wb') as f:
   receivedData = ""
    while True:
     t = conn.recv(1)
     print t
     if t =='':
        s.close()
        break
     receivedData+=t

   f.write(receivedData)

Upvotes: 1

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