Library (julian), lack of usage information

[samsonite]

Been installed julian from here: https://pypi.org/project/julian/ and got the related julian-0.14 package from Download files at lefside of the webpage, I realized that it works properly only when the back calculation julian.from_jd is carried out inside the same script of direct procedure julian.from_jd, as shown below:

# ------- jul1.py --------
import julian
import datetime
mjd = 58370.50847222222
dt = julian.from_jd(mjd, fmt='mjd')
print(dt)
#
jd = julian.to_jd(dt + datetime.timedelta(hours=12), fmt='jd')
print(jd-2400001)

# ------- OUTPUTS -----------
# 2018-09-09 12:12:12.000012
# 58370.50847222237
# My remark: mjd back calculation= jd-2400001

Nothing is said by the library author (lack of usage information) about calendar date string format in case the problem is formulated independentely: given date (2018-09-09) and time (12:12:12.0000), find mjd.

Here my trial code:

# ------- jul2.py --------
import julian
from datetime import datetime
#
#dt = '2007-09-29 18:43:11.999982'
#dt = datetime(year=2007, day=29, month=9)
#
jd = julian.to_jd(datetime(year=2007,month=9,day=29,hours=18,minutes=43,seconds=12.000), fmt='jd')
print(jd)

and error

Error:
C:\Training>python jul2.py
Traceback (most recent call last):
  File "jul2.py", line 8, in <module>
    jd = julian.to_jd(datetime(year=2007,month=9,day=29,hours=18,minutes=43,seconds=12.000), fmt='jd')
TypeError: 'hours' is an invalid keyword argument for this function

Before asking info to the author, I'ld like to get help from forum. Thanks in advance