TypeError: a float is required PYTHON

Question

My current python script:

import ftplib
import hashlib
import httplib
import pytz
from datetime import datetime
import urllib
from pytz import timezone
import os.path, time
import glob

def ftphttp():
 dataset_path='Desktop'   
 files = glob.glob(dataset_path+"/images/*.png")   
 ts = files.sort(key=os.path.getmtime)
 dt = datetime.fromtimestamp(ts, pytz.utc)
 timeZone= timezone('Asia/Singapore')
 localtime = dt.astimezone(timeZone).isoformat()

 cam = "002"

 lscam = localtime + cam
 ftp = ftplib.FTP('localhost','kevin403','S$ip1234')
 ftp.cwd('/var/www/html/image')

 m=hashlib.md5()
 m.update(lscam)
 dd=m.hexdigest()

 for image in glob.glob(os.path.join('Desktop/images/*.png')):
  with open(image, 'rb') as file:
    ftp.storbinary('STOR '+dd+ '.png', file)

 x = httplib.HTTPConnection('localhost', 8086)
 x.connect()
 f = {'ts' : localtime}
 x.request('GET','/camera/store?cam='+cam+'&'+urllib.urlencode(f)+'&fn='+dd)
 y = x.getresponse()
 z=y.read()
 x.close()
 ftp.quit()

The trackback:

Traceback (most recent call last):
File "<pyshell#49>", line 1, in <module>
 ftphttp()
File "/home/kevin403/Testtimeloop.py", line 17, in ftphttp
 dt = datetime.fromtimestamp(ts, pytz.utc)
TypeError: a float is required

I trying to get a list of files in a folder to get their modified timestamp and store it in a database. But i can't seem to do it. Anybody got an idea on how to do it? Been trying it for quite long and i'm new to python.

Not related but would strongly recommend switching to standard 4 space indent... — Julien
– Julien, Commented Aug 15, 2016 at 4:54

Leonardo Andrade · Accepted Answer · 2016-08-15 04:55:03Z

2

This occurs because the function glob.glob, returns an array of strings, and you are trying to pass this result to "datetime.fromtimestamp" function, that expects a number.

Any moment you "store" the modified date, to use after.

You needs to manipulate the files one by one. Example (I didn't test):

files = glob.glob(dataset_path+"/images/*.png")   
ts = files.sort(key=os.path.getmtime)
for file in ts:
    ms = os.path.getmtime(file)
    dt = datetime.fromtimestamp(ms)
...

or if you only needs the modification dates (without the path of file):

files = glob.glob(dataset_path+"/images/*.png")
ts = map(os.path.getmtime, files)
dts = map(datetime.fromtimestamp, ts)
...

References:

https://docs.python.org/2/library/datetime.html#datetime.date.fromtimestamp https://docs.python.org/2/library/glob.html#glob.glob

answered Aug 15, 2016 at 4:55

Leonardo Andrade

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3 Comments

Alvin Wee Over a year ago

Now i able to print out all the list of files timestamp but i got this error : AttributeError: 'list' object has no attribute 'astimezone'

Alvin Wee Over a year ago

It is able to print out all the files : [1467910949.379998, 1466578005.0, 1466528946.0]

Alvin Wee Over a year ago

I needed the pytz timezone but how should i do that.

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