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該程序返回指定字符串的truth_table。我想從控制檯讀取一個字符串,但我不知道如何創建dinamically變量。我試過(幾乎)一切,但沒有奏效。請幫幫我。對不起我的英語不好。自動創建Python變量
from itertools import izip, product, tee
# Logic functions: take and return iterators of truth values
def AND(a, b):
for p, q in izip(a, b):
yield p and q
def OR(a, b):
for p, q in izip(a, b):
yield p or q
def NOT(a):
for p in a:
yield not p
def EQUIV(a, b):
for p, q in izip(a, b):
yield p is q
def IMPLIES(a, b):
for p, q in izip(a, b):
yield (not p) or q
def XOR(a,b):
for p,q in izip(a,b):
yield (p and (not q)) or ((not p) and q)
def create(num=2):
#''' Returns a list of all of the possible combinations of truth for the
given number of variables.
#ex. [(T, T), (T, F), (F, T), (F, F)] for two variables '''
return list(product([True, False], repeat=num))
def unpack(data):
#''' Regroups the list returned by create() by variable, making it suitable
for use in the logic functions.
#ex. [(T, T, F, F), (T, F, T, F)] for two variables '''
return [[elem[i] for elem in lst] for i, lst in enumerate(tee(data,
len(data[0])))]
def print_result(data, result):
''' Prints the combinations returned by create() and the results returned
by the logic functions in a nice format. '''
n = len(data[0])
headers = 'abcdefghijklmnopqrstuvwxyz'[:n]
print headers + "|RESULT"
print '-' * len(headers) + '+------'
for row, result_cell in izip(data, result):
print ''.join({True: 'T', False:'F'}[cell] for cell in row) + '|' +
' ' + {True: 'T', False:'F'}[result_cell]
if __name__ == '__main__':
data = create(num = 2)
a,b = unpack(data)
result = IMPLIES(a,b)
print_result(data, result)
如果你想要動態變量名稱,你應該使用一個字典。例如'{'name1':value,'name2':value2,...} – IanAuld