[英]Getting an error on trying to execute a golang program from a python script
我正在對C ++和GoLang之間的性能比較進行編程,以獲取數據來進行統計分析,並且我創建了一個Python腳本來獲取所有數據並由兩個程序自己執行。 使用C ++,我沒有問題,執行正常,但是在執行過程中出現以下錯誤:
panic: runtime error: index out of range
goroutine 1 [running]:
runtime.panic(0x44d600, 0x4b9897)
/usr/lib/go/src/pkg/runtime/panic.c:266 +0xb6
main.merge(0xc210047000, 0x9, 0x10, 0x8, 0x8, ...)
/windows/DATA/FIB/PE/B7_PLSpeed/nlogn.go:13 +0x22c
main.mergesort(0xc210047000, 0x9, 0x10, 0x8, 0x9)
/windows/DATA/FIB/PE/B7_PLSpeed/nlogn.go:43 +0xec
main.mergesort(0xc210047000, 0x9, 0x10, 0x5, 0x9)
/windows/DATA/FIB/PE/B7_PLSpeed/nlogn.go:42 +0xac
main.mergesort(0xc210047000, 0x9, 0x10, 0x0, 0x9)
/windows/DATA/FIB/PE/B7_PLSpeed/nlogn.go:42 +0xac
main.main()
/windows/DATA/FIB/PE/B7_PLSpeed/nlogn.go:54 +0x1c1
如果有人可以幫助我,我將非常高興! 我將在這里留下我的Python腳本和Go源代碼。
蟒蛇:
import time
import random
from subprocess import call
from sys import argv
def usage():
print("Usage: " + argv[0] + " <Binary1> <Binary2> <n elements> <#executions>")
if __name__ == '__main__':
if len(argv) != 5:
usage()
else:
program1 = argv[1]
program2 = argv[2]
n = int(argv[3])
executions = int(argv[4])
for x in range(0, executions):
command = ['']
# 32-bit range vector(n) random generator
for y in range(0, n-1):
command.append(str(random.randint(-2147473648, 2147473647)))
if(random.choice((True, False))):
program1, program2 = program2, program1
# Program1
command[0] = './' + program1
pre = time.time()
call(command)
post = time.time()
f = open(program1 + ' - ' + str(n), 'a')
f.write(str(post-pre) + "ms\n")
f.close
# Program2
command[0] = './' + program2
pre = time.time()
call(command)
post = time.time()
f = open(program2 + ' - ' + str(n), 'a')
f.write(str(post-pre) + "ms\n")
f.close
走:
package main
import "strconv"
import "os"
func merge(v []int, e int, m int, d int) {
size := d-e+1
B := make([]int, size)
i := e
j := m + 1
k := 0
for i <= m && j <= d {
if v[i] <= v[j] {
B[k] = v[i]
k++
i++
} else {
B[k] = v[j]
k++
j++
}
}
for i <= m {
B[k] = v[i]
k++
i++
}
for j <= d {
B[k] = v[j]
k++
j++
}
for k := 0; k <= d-e; k++ {
v[e+k] = B[k]
}
}
func mergesort(v []int, e int, d int) {
if e < d {
m := (e+d)/2
mergesort(v, e, m)
mergesort(v, m+1, d)
merge(v, e, m, d)
}
}
func main() {
v := make([]int, 0)
args := os.Args
for i := 1; i < len(args); i++ {
f,_ := strconv.Atoi(os.Args[i])
v = append(v, f)
}
mergesort(v, 0, len(args) - 1)
}
問題不在您的Python中,因為Go程序會得到相同的錯誤,而不會被Python調用。 在main
函數中,您將從參數位置1
開始創建一個名為v
的切片,因此不包括程序名稱:
for i := 1; i < len(args); i++ {
f,_ := strconv.Atoi(os.Args[i])
v = append(v, f)
}
但是,然后您給mergesort
賦予了args
的長度,而不是v
的長度,所以這是一個錯誤的錯誤,因為它被告知v
比實際多了1個元素。 程序開始嘗試訪問v
的元素,該元素超出切片的末尾:
mergesort(v, 0, len(args) - 1)
嘗試在主函數中使用mergesort(v, 0, len(v) - 1)
。
嘗試更改:
call(command)
至
call(command, shell=True)
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