def wizard(self, page_txt_obj=None, sh_class=cli.Cli):
"""
Interactively populates the Polynomial.
"""
self.list_ = []
menu2 = PlainList(['add monomial term', 'DONE'])
menu2.label = 'Polynomial Wizard'
while True:
sel2 = cli.Cli.make_page(
'Polynomial', page_txt_obj, lambda: sh_class.list_menu(menu2))
if sel2 == 1:
# Add monomial term
print('') # pylint: disable=C0325
coef_str = ''
while len(coef_str) == 0:
coef_str = sh_class.input('coefficient?')
coef = float(coef_str)
pow_str = ''
while len(pow_str) == 0:
pow_str = sh_class.input('power?')
pow_ = float(pow_str)
self.list_.append(Term(coef, pow_))
menu2.label = str(self)
self.dict.clear()
for index in range(len(self)):
exponent = self.list_[index].exp
if exponent in list(self.dict.keys()):
self.dict[exponent] += self.list_[index].coef
else:
self.dict[exponent] = self.list_[index].coef
elif sel2 == 2:
break
def open_p_file(cls, filename=None):
"""
Loads a pickle file. Prompts user for a file name if one is not
provided.
obj = cls.open_p_file()
obj = cls.open_p_file(filename)
"""
if cls.interface in ['bash', 'sh']:
cls.print_header('FILE: Open a pickle file')
if filename != None:
pass
else:
if cls.interface == 'Tk':
filename = tkFileDialog.askopenfilename(
parent=cls.main_window, title='Choose a file', filetypes=[(
'Pickle files', '*.p')])
else:
file_list = os.listdir(os.getcwd())
pickle_list = [_file for _file in file_list if _file.endswith(
'.p')]
#Prompt user for a filename, if none given
open_menu = PlainList(pickle_list)
open_menu.label = 'Choose a file to open:'
filename = pickle_list[cls.list_menu(open_menu) - 1]
a_file = open(filename, 'rb')
return pickle.load(a_file)