python - Assertion not valid in script though type comparison works in terminal -

i encounter quite strange issue comparison.

i want decode python script arguments, store them , analyse them. in following command, -r option shall used determine type of report create.

python script launching : %run decodage_parametres_script.py -r junit,html

python script options parsing used fill dictionary, result is: current_options :

{'-cli-no-summary': false, '-cli-silent': false, '-r': ['junit', 'html']}

then want test -r options, here code:

for in current_options['-r']:     # each reporter required -r option:     #    - check file path has been configured (otherwise set default)     #    - create file , initialize fields     print("trace i", i)     print("trace current_options['-r'] = ", current_options['-r'])     print("trace current_options['-r'][0] = ", current_options['-r'][0])      if current_options['-r'][i] == 'junit':         # request xml report file         print("request xml export")         try:             xml_file_path = current_option['--reporter-junit-export']             print("xml file path = ", xml_file_path)         except:             # missing file configuration             print("xml option - missing file path information")             timestamp = get_timestamp()             xml_file_path = 'default_report' + '_' + timestamp + '.xml'             print("xml file path = ", xml_file_path)         if xml_file_path not none:             touch(xml_file_path)             print("xml file path = ", xml_file_path)         else:             print('error: empty --reporter-junit-export path')             sys.exit(0)     else:         print("no xml file required")     

i want try default report generation don't hit print("request xml export") line, here console result :

trace junit trace current_options['-r'] =  ['junit', 'html'] trace current_options['-r'][0] =  junit 

as guess type issue, tried following tests:

in [557]: in current_options['-r']:  ...:     print(i, type(i))  ...: junit <class 'str'> html <class 'str'>  in [558]: toto = 'junit'  in [559]: type(toto) out[559]: str  in [560]: toto out[560]: 'junit'  in [561]: toto == current_options['-r'][0] out[561]: true 

so line assertion if current_options['-r'][i] == 'junit': should end begin true it's not case. missing trivial ??? :(

can me, please ?

you iterating array of strings

for in current_options['-r']: 

in case i be:
junit on first iteration
html on next iteration

and if condition (from interpreter perspective) looks like:

  if current_options['-r']['junit'] == 'junit': 

instead of expected:

  if current_options['-r'][0] == 'junit': 

solution 1:
need iterate through of range(len(current_options['-r']))

solution 2
change comparator:
from

if current_options['-r'][i] == 'junit': 

to

if == 'junit':