Sublime2一直崩溃？ 我的python代码有什么问题？

Question

I'm learning python, but this code keeps crashing my text editor.

Can anyone tell me what I'm doing wrong?

x = 12
epsilon = 0.01
numGuesses = 0
low = 0.0
high = max(1.0, x)
ans = (high + low)/2.0

while abs (ans**2 - x) >= epsilon:
    print 'low =', low, 'high =', high, 'ans =', ans
    numGuesses += 1
    if ans**2 < x:
        low = ans
    else:
        high - ans
    ans = (high + low)/2.0

print 'numGuesses =', numGuesses

print ans, 'is close to square root of', x

Any suggestions?

Answer 1

Should be this instead:

x = 12
epsilon = 0.01
numGuesses = 0
low = 0.0
high = max(1.0, x)
ans = (high + low)/2.0

while abs (ans**2 - x) >= epsilon:
    print 'low =', low, 'high =', high, 'ans =', ans
    numGuesses += 1
    if ans**2 < x:
        low = ans
    else:
        high = ans
    ans = (high + low)/2.0

print 'numGuesses =', numGuesses

print ans, 'is close to square root of', x

Answer look like this:

low = 0.0 high = 12 ans = 6.0
low = 0.0 high = 6.0 ans = 3.0
low = 3.0 high = 6.0 ans = 4.5
low = 3.0 high = 4.5 ans = 3.75
low = 3.0 high = 3.75 ans = 3.375
low = 3.375 high = 3.75 ans = 3.5625
low = 3.375 high = 3.5625 ans = 3.46875
low = 3.375 high = 3.46875 ans = 3.421875
low = 3.421875 high = 3.46875 ans = 3.4453125
low = 3.4453125 high = 3.46875 ans = 3.45703125
numGuesses = 10
3.462890625 is close to square root of 12

Answer 2

You are in an endless while -loop. When you have a look at this part:

while abs(ans**2 - x) >= epsilon:

while abs(ans**2 - x) always gives 24, while epsilon is set to 0.01.

When learning to program, while loops are tricky. They will keep your processor busy until you forcefully abort them. This is also what has been crashing your text editor.