import mathnumber = input('Your Number: ')ways = input('sin/cos/tan: ')try: problem = ways(number) answer = math.problem print(f'The value of {ways} of {number} is: {problem}')這是我的代碼。我想使用 python 中的數(shù)學(xué)模塊來(lái)求解三角函數(shù)，但每次運(yùn)行它時(shí)都會(huì)出現(xiàn)錯(cuò)誤SyntaxError: unexpected EOF while parsing
3 回答
紫衣仙女
TA貢獻(xiàn)1839條經(jīng)驗(yàn) 獲得超15個(gè)贊
我試圖try except通過(guò)使用稍微不同的邏輯來(lái)測(cè)試輸入的有效性來(lái)完全避免您的問(wèn)題。
另外，我使用了在運(yùn)行時(shí)將字符串映射到函數(shù)的規(guī)范解決方案，即使用映射（在 Python 中，a dict）。
這是我的解決方案，經(jīng)過(guò)一些測(cè)試運(yùn)行。
In [6]: import math
...: trigs = {'sin':math.sin, 'cos':math.cos, 'tan':math.tan}
...: while True:
...: try:
...: number = input('Your Number: ')
...: fnumber = float(number)
...: break
...: except ValueError:
...: print('You input a non-valid floating point number.\nPlease try again')
...: continue
...: while True:
...: trig = input('sin/cos/tan: ')
...: if trig in trigs: break
...: print('You input a non-valid trig function.\nPlease try again')
...:
...: print(f'The value of {trig} of {number} is: {trigs[trig](fnumber)}')
Your Number: ret
You input a non-valid floating point number.
Please try again
Your Number: 1.57
sin/cos/tan: ert
You input a non-valid trig function.
Please try again
sin/cos/tan: tan
The value of tan of 1.57 is: 1255.7655915007897
In [7]:
30秒到達(dá)戰(zhàn)場(chǎng)
TA貢獻(xiàn)1828條經(jīng)驗(yàn) 獲得超6個(gè)贊
你應(yīng)該有一個(gè)except塊，它至少可以處理錯(cuò)誤pass
ways實(shí)際上是函數(shù)，采用不同的輸入
import math
number = input('Your Number: ')
ways_ = input('sin/cos/tan: ')
try:
problem = ways(number)
answer = math.problem
print(f'The value of {ways} of {number} is: {number}')
except:
pass
# anything else?? handle errors??
波斯汪
TA貢獻(xiàn)1811條經(jīng)驗(yàn) 獲得超4個(gè)贊
您需要添加except用于處理異常的塊，以防代碼中出現(xiàn)問(wèn)題。
您可以編寫(xiě)這樣的代碼來(lái)實(shí)現(xiàn)您想要的任務(wù)：
import math
number = input('Your Number: ')
ways = input('sin/cos/tan: ')
def math_func(num, type_func):
func = {'sin': lambda: math.sin(num),
'cos': lambda: math.cos(num),
'tan': lambda: math.tan(num)}
return func.get(type_func)()
try:
answer = math_func(float(number), ways)
print(f'The value of {ways} of {number} is: {answer}')
except:
pass
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