Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_pow.py @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 7e001c4810bb
children ac4b44473869
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7e001c4810bb Test set for new pow() function
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1 import sys
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2
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3 def powtest(type):
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4 if (type!=float):
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5 print " Testing 2-argument pow() function..."
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6 for i in range(-1000, 1000):
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7 if (pow(type(i),0)!=1):
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8 raise ValueError, 'pow('+str(i)+',0) != 1'
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9 if (pow(type(i),1)!=type(i)):
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10 raise ValueError, 'pow('+str(i)+',1) != '+str(i)
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11 if (pow(type(0),1)!=type(0)):
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12 raise ValueError, 'pow(0,'+str(i)+') != 0'
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13 if (pow(type(1),1)!=type(1)):
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14 raise ValueError, 'pow(1,'+str(i)+') != 1'
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15
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16 for i in range(-100, 100):
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17 if (pow(type(i),3)!=i*i*i):
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18 raise ValueError, 'pow('+str(i)+',3) != '+str(i*i*i)
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19
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20 pow2=1
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21 for i in range(0,31):
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22 if (pow(2,i)!=pow2):
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23 raise ValueError, 'pow(2,'+str(i)+') != '+str(pow2)
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24 if (i!=30): pow2=pow2*2
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25
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26 print " Testing 3-argument pow() function..."
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27 il, ih = -20, 20
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28 jl, jh = -5, 5
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29 kl, kh = -10, 10
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30 if (type==float):
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31 il=1
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32 elif (type==int):
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33 jl=0
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34 elif (type==long):
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35 jl,jh = 0, 15
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36 for i in range(il, ih+1):
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37 for j in range(jl,jh+1):
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38 for k in range(kl, kh+1):
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39 if (k!=0):
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40 if (pow(type(i),j,k)!=pow(type(i),j)% type(k) ):
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41 raise ValueError, "pow(" +str(i)+ "," +str(j)+ \
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42 "," +str(k)+ ") != pow(" +str(i)+ "," + \
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43 str(j)+ ") % " +str(k)
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44
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45
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46 print 'Testing integer mode...'
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47 powtest(int)
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48 print 'Testing long integer mode...'
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49 powtest(long)
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50 print 'Testing floating point mode...'
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51 powtest(float)
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52
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53 # Other tests-- not very systematic
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54
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55 print 'The number in both columns should match.'
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56 print pow(3,3) % 8, pow(3,3,8)
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57 print pow(3,3) % -8, pow(3,3,-8)
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58 print pow(3,2) % -2, pow(3,2,-2)
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59 print pow(-3,3) % 8, pow(-3,3,8)
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60 print pow(-3,3) % -8, pow(-3,3,-8)
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61 print pow(5,2) % -8, pow(5,2,-8)
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62 print
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63
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64 print pow(3L,3L) % 8, pow(3L,3L,8)
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65 print pow(3L,3L) % -8, pow(3L,3L,-8)
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66 print pow(3L,2) % -2, pow(3L,2,-2)
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67 print pow(-3L,3L) % 8, pow(-3L,3L,8)
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68 print pow(-3L,3L) % -8, pow(-3L,3L,-8)
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69 print pow(5L,2) % -8, pow(5L,2,-8)
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70 print
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71
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72 print pow(3.0,3.0) % 8, pow(3.0,3.0,8)
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73 print pow(3.0,3.0) % -8, pow(3.0,3.0,-8)
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74 print pow(3.0,2) % -2, pow(3.0,2,-2)
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75 print pow(5.0,2) % -8, pow(5.0,2,-8)
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76 print
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77
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78 for i in range(-10, 11):
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79 for j in range(0, 6):
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80 for k in range(-7, 11):
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81 if (j>=0 and k!=0):
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82 o=pow(i,j) % k
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83 n=pow(i,j,k)
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84 if (o!=n): print 'Integer mismatch:', i,j,k
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85 if (j>=0 and k<>0):
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86 o=pow(long(i),j) % k
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87 n=pow(long(i),j,k)
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88 if (o!=n): print 'Long mismatch:', i,j,k
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89 if (i>=0 and k<>0):
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90 o=pow(float(i),j) % k
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91 n=pow(float(i),j,k)
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92 if (o!=n): print 'Float mismatch:', i,j,k