1. kun() - Det bruges til at tælle antallet af elementer (elementer/tegn) af iterables som liste tuple string ordbog osv.
2. str() - Det bruges til at transformere dataværdi (heltals flydende liste) til streng.
3. abspath() - Det returnerer den absolutte sti til fil-/biblioteksnavnet, der er sendt som argument.
4. opregne() - Returnerer et enumerate-objekt for den beståede iterable, der kan bruges til at iterere over elementerne i iterable med adgang til deres indekser.
5. liste() - Det bruges til at oprette en liste ved at bruge en eksisterende iterable (liste tuple ordbog sæt).
6. listdir() - Det bruges til at liste indholdet i mappen. Stien til biblioteket sendes som et argument.
7. isfil() - Den kontrollerer, om den beståede parameter angiver stien til en fil. Hvis ja, så vender tilbage ægte ellers falsk
isdir()- Den kontrollerer, om den beståede parameter angiver stien til en mappe. Hvis ja, så vender tilbage ægte ellers falsk tilføje()- Det bruges til at tilføje elementer på listen.

>>> nums = [12345] # list >>> name = 'Alexander' >>> details = {'name': 'Hemkesh' 'age': 23 'active': True} >>> >>> # Using len() ... >>> len(nums) 5 >>> len(name) 9 >>> len(details) 3 >>> >>> # Using str() ... >>> str(12) '12' >>> str(nums) '[1 2 3 4 5]' >>> str(details) '{'active': True 'age': 23 'name': 'Hemkesh'}' >>> >>> # Using abspath() ... >>> import os >>> os.listdir('.') ['Django' 'Prep' 'python-the-snake'] >>> os.path.abspath('./Django') # pass '.Django' on windows '/Users/admin/projects/Python/Django' >>> os.path.abspath('Django') '/Users/admin/projects/Python/Django' >>> >>> # Using enumerate() ... >>> enumerate(nums) <enumerate object at 0x100620b90> >>> >>> for index item in enumerate(nums): ... print index item ... 0 1 1 2 2 3 3 4 4 5 >>> >>> # Using list() ... >>> list() [] >>> list(details ) ['active' 'age' 'name'] >>> list(name) ['A' 'l' 'e' 'x' 'a' 'n' 'd' 'e' 'r'] >>> >>> # Using isfile() & isdir() ... >>> os.path.isdir('Django') True >>> os.path.isfile('Django') False >>> >>> os.path.isdir('./python-the-snake/README.md') False >>> os.path.isfile('./python-the-snake/README.md') True >>> >>> # Using append() ... >>> nums.append(12) >>> nums [1 2 3 4 5 12] >>> nums.append(67) >>> nums [1 2 3 4 5 12 67] >>> >>> # Don't press 'Run on IDE' button available on right. You will get error  ... # as the statements are already executed on interactive terminal. ... >>> 

# Python version : 2.7.12 # len() # To count number of items in a list # To count number of characters in a string evens = [ 2 34 6 8 10] print len(evens) city = 'Bangalore' print len(city) 'n' # str() : Converting into string representation odds = [ 1 3 67 45 83 59] year = 2017 print odds print str(odds) + ' A list.n' print year print str(year) + ' A year.n' # enumerate() : iterating over index & value of a list for (index item) in enumerate(odds): print index item # abspath() : Getting absolute path of passed argument(path) import os absolute_path = os.path.abspath('.') print 'n' absolute_path 'n' # isdir() : To check if passed argument is valid directory path answer = os.path.isdir('/Users/admin/Desktop/js') print answer # isfile() : To check if the passed argument is valid file path answer = os.path.isfile('/Users/admin/Desktop/js/array.js') print answer 'n' # list() : To create list details = { 'name':'Rojert Rendrick' 'age':24 'city':'Bangalore' } keys = list( details ) print keys 'n' # append() : Appending items to list print evens evens.append(98) evens.append(64) print evens 'n' # repetition operator(*) on strings print 'Python'*3 print '#'*20 

5 9 [1 3 67 45 83 59] [1 3 67 45 83 59] A list. 2017 2017 A year. 0 1 1 3 2 67 3 45 4 83 5 59 /Users/admin/projects/Python/PythonFiles True True ['city' 'age' 'name'] [2 34 6 8 10] [2 34 6 8 10 98 64] PythonPythonPython #################### 

I dit tilfælde vil det være anderledes. Du behøver kun at videregive den nøjagtige sti til den mappe, du vil have vist.

# This Python code is for Python version : 2.7.12 def show_directories(dir_list path):  ''' A function that lists the directories ''' import os s = '%s%d%s'%('n' len(dir_list) ' directories of ' + os.path.abspath(path)) l = len(s) print s print '='*l for index dir in enumerate(dir_list): print str(index+1) + ') ' dir def show_files(file_list path):  ''' A function that lists the files ''' import os s = '%s%d%s'%('n' len(file_list) ' files of ' + os.path.abspath(path)) l = len(s) print s print '='*l for index file in enumerate(file_list): print str(index+1) + ') ' file def show_cwd_contents( path='.' ): # A function that calls 2 functions to separately  # listing out directories and files. # It takes a default argument as cwd(.). We can  # pass other paths too. import os f_list = [] d_list = list() try: for f in os.listdir(path): if os.path.isfile(os.path.join(path f)): f_list.append(f) else: if os.path.isdir(os.path.join(path f)): d_list.append(f) except: print 'nError once check the path' return show_files(f_list path) show_directories(d_list path) if __name__ == '__main__': # If this module is imported in other module then  # we need to separately call show_cwd_contents() Or  # show_cwd_contents(path). show_cwd_contents() show_cwd_contents('/Users/admin/projects/Python/PythonFiles') 

5 files of /Users/admin/projects/Python/Django/E-Commerce-projects/ecommerce-2/src =================================================================================== 1) .gitignore 2) db.sqlite3 3) manage.py 4) requirements.txt 5) todo.txt 5 directories of /Users/admin/projects/Python/Django/E-Commerce-projects/ecommerce-2/src ========================================================================================= 1) ecommerce2 2) newsletter 3) products 4) static_in_pro 5) templates 70 files of /Users/admin/projects/Python/PythonFiles ===================================================== 1) 2_list_iterators.py 2) app.py 3) class_script_exec.py 4) class_variables.py 5) date_and_time.py 6) datetime.txt 7) dict.py 8) dictionary.py 9) django_home.html 10) error_handling.py 11) error_handling_output.py 12) error_handling_output.txt 13) execution_pickle.py 14) fb_task.py 15) for.py 16) gfg_sum_of_primes_in_numbers.py 17) hackerrank_numbers.py 18) hck_addition_aint_simple.py 19) hck_biased_chandan.py 20) hck_c_counts.py 21) hck_c_counts2.py 22) hck_c_counts3.py 23) hck_cool_numbers.py 24) hck_earth_fans.py 25) hck_earth_fans_2.py 26) hck_earth_fans_3.py 27) hck_earth_fans_final_on_28_dec_2016.py 28) hck_Little_Jhool_and_psychic_powers.py 29) hck_lonely_monk.py 30) hck_lonely_monk_orig.py 31) hck_maximum_AND.py 32) hck_min_max_problem.py 33) hck_monk_and_power_of_time.py 34) hck_numbers_rotation.py 35) hck_palindomic_numbers.py 36) hck_print_hackerearth.py 37) hck_print_hackerearth_2_way.py 38) hck_range_query.py 39) hck_recursive_functions.py 40) hck_recursive_sums.py 41) hck_strange_addition.py 42) hck_sum_of_numbers.py 43) interactive_img_resolutions.txt 44) json.py 45) json.pyc 46) katyperry.py 47) lambda_expression.py 48) linked_list_delete_nodes_at_front.py 49) linked_list_delete_nodes_at_front_output.txt 50) linked_list_is_palindrome_gfg.py 51) linked_list_is_palindrome_gfg_output.text 52) linked_list_is_palindrome_gfg_testing.py 53) linked_list_node_deletion_from_any_position.txt 54) linked_list_node_deletion_from_end.py 55) linked_list_node_deletion_from_end_output.txt 56) linked_list_node_deletion_from_middle.py 57) linked_list_node_insertion_at_beginning.py 58) linked_list_node_insertion_at_end.py 59) linked_list_node_insertion_at_middel_output.txt 60) linked_list_node_insertion_at_middle.py 61) map.py 62) merge_lists.py 63) mufeez_android_interview.py 64) python_for_loops.py 65) python_for_loops2.py 66) remove_dupliates.py 67) show_dir_and_files.py 68) show_dir_and_files_test.py 69) smarika_urllib_python2.7.10.py 70) while.py 2 directories of /Users/admin/projects/Python/PythonFiles ========================================================== 1) socket_programming 2) wx