Question

当我调用二进制文件时，我需要覆盖第一个参数。

由于它是程序名称，我有两个解决方案：

移动二进制文件并使用其新名称调用它;或
创建别名（如果shell允许）。

但是，有时我需要完全删除第一个参数。

我在C中编写了一个简单的程序来完成这项工作：

import pandas as pd
link_energy = 'http://unstats.un.org/unsd/environment/excel_file_tables/2013/Energy%20Indicators.xls'
df_energy = pd.read_excel(link_energy)
df_energy

我有一个内置的方法来做shell吗？首选bash的解决方案。

Answer 1

您可以使用busybox覆盖它，但不能设置它。

例如，要将argv[0]设置为ls来运行( exec -a ls busybox )：

import cv2
import sys

(major_ver, minor_ver, subminor_ver) = (cv2.__version__).split('.')

img = cv2.imread('OXO200Front.jpg')

if __name__ == '__main__' :

# Set up tracker.
# Instead of MIL, you can also use

tracker_types = ['BOOSTING', 'MIL','KCF', 'TLD', 'MEDIANFLOW', 'GOTURN']
tracker_type = tracker_types[2]

if int(minor_ver) < 3:
    tracker = cv2.Tracker_create(tracker_type)
else:
    if tracker_type == 'BOOSTING':
        tracker = cv2.TrackerBoosting_create()
    if tracker_type == 'MIL':
        tracker = cv2.TrackerMIL_create()
    if tracker_type == 'KCF':
        tracker = cv2.TrackerKCF_create()
    if tracker_type == 'TLD':
        tracker = cv2.TrackerTLD_create()
    if tracker_type == 'MEDIANFLOW':
        tracker = cv2.TrackerMedianFlow_create()
    if tracker_type == 'GOTURN':
        tracker = cv2.TrackerGOTURN_create()

cap = cv2.VideoCapture(0)
ok, frame = cap.read()

#Initializing a bounding box 
bbox = img

bbox = cv2.selectROI(frame, False)
ok = tracker.init(frame, bbox)

while(1):
    ok, frame = cap.read()
    timer = cv2.getTickCount()
    ok, bbox = tracker.update(frame)
    fps = cv2.getTickFrequency() / (cv2.getTickCount() - timer);
if ok:
    p1 = (int(bbox[0]), int(bbox[1]))
    p2 = (int(bbox[0] + bbox[2]), int(bbox[1] + bbox[3]))
    cv2.rectangle(frame, p1, p2, (255,0,0), 2, 1)
else :
    # Tracking failure
    cv2.putText(frame, "Tracking failure detected", (100,80), 
    cv2.FONT_HERSHEY_SIMPLEX, 0.75,(0,0,255),2)
    cv2.putText(frame, tracker_type + " Tracker", (100,20), 
    cv2.FONT_HERSHEY_SIMPLEX, 0.75, (50,170,50),2);

# Display FPS on frame
cv2.putText(frame, "FPS : " + str(int(fps)), (100,50), 
cv2.FONT_HERSHEY_SIMPLEX, 0.75, (50,170,50), 2);

# Display result
cv2.imshow("Tracking", frame)

K = cv2.waitKey(1)
if (K==27):
    break
cap.release()
cv2.destroyAllWindows()

调用程序时覆盖第一个参数

1 个答案: