How can I select an item in a list?

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I have:

I have two lists like this:

[('ELON_MUSK', True), ('BARACK_OBAMA', False), ('DONALD_TRUMP', False)]
[('ELON_MUSK', False), ('BARACK_OBAMA', True), ('DONALD_TRUMP', False)]

I want to (the problem):

Since ELON_MUSK and BARACK_OBAMA is true I want to retrieve them, and append to a string, however I'm pretty sure I don't know how to search the problem in correct terms since I found nothing about this, thus asking here.

I expect to happen:

People in this image: ELON_MUSK BARACK_OBAMA

I'm doing:

for imagePath in imageArray:
        # Try comparing an unknown image
        unknown_image = face_recognition.load_image_file(imagePath)
        unknown_face = face_recognition.face_encodings(unknown_image)
        face_count = len(unknown_face)
        name_list = ""
        print("Checking: " + imagePath)
        print("----------------------------")
        for i in range(face_count):
                result = face_recognition.compare_faces(face_encodings, unknown_face[i])
                # Print the result as a list of names with True/False
                names_with_result = list(zip(face_names, result))
                print(names_with_result, end = '')
                print(" -- Checking face #" + str(i+1))
                # vvv I HAVE NO IDEA ABOUT THIS PART vvv
                if "True" in names_with_result:
                        #name_list = name_list + " name of the TRUE person";
        print("People in this image: " + name_list)

I'm getting:

People in this image: 
# Separate lists of (name, is_in_image) tuples
>>> a = [('ELON_MUSK', True), ('BARACK_OBAMA', False), ('DONALD_TRUMP', False)]
>>> b = [('ELON_MUSK', False), ('BARACK_OBAMA', True), ('DONALD_TRUMP', False)]
# Combine the lists
>>> together = a + b
# Create a list containing all names if the second element (is_in_image) is True
>>> [name for name, is_in_image in together if is_in_image]
['ELON_MUSK', 'BARACK_OBAMA']
>>> print('People in this image: {}'.format(', '.join([name for name, is_in_image in together if is_in_image])))
People in this image: ELON_MUSK, BARACK_OBAMA

I think the main issue with your current approach is that your test for appending is if 'True' in names_with_result and not if True in names_with_result... 'True' != True...

>>> sample_result = ('ELON_MUSK', True)
>>> 'True' in sample_result
False
>>> True in sample_result
True

The first test, 'True' in sample_result returns False, which then won't trigger your appending logic, thus passing over that element.

How can I select an item in a list?, # Separate lists of (name, is_in_image) tuples >>> a = [('ELON_MUSK', True), ('​BARACK_OBAMA', False), ('DONALD_TRUMP', False)] >>> b  Fixes an issue in which you can't select the first item in ListView control by touching the screen. This issue occurs on certain touch-only devices that are running Windows 8.1. You can't select the first item in a list by touching in Windows 8.1

Note: Your variable 'name_list' is not a list, but a string. Keep that in mind when you want to append to it.

List comprehension is perfect, but if you are learning and want to do it more explicitly, you can loop through each tuple in each list. For each list, you can check if the second argument is true, and if so, add it to the string ('name_list').

for tup in l1:
    if tup[1]:
        name_list += tup[0]

Python random.choice() to choose random element from list, String , Use random module choice() function to randomly select an item from a list, String, Dictionary and set. random.choice() syntax and examples. Says in the manual to select an item from a list in a text message you press (but not hold it down) the pen icon button and the centre joystick button at the same time. I do this and it does nothing. As contrasted to selecting multiple items in a list which it says you do by holding the pen icon button DOWN and then pressing the down or up arrow.

Try this one:

A= [('ELON_MUSK', True), ('BARACK_OBAMA', False), ('DONALD_TRUMP', False)]
B= [('ELON_MUSK', False), ('BARACK_OBAMA', True), ('DONALD_TRUMP', False)]


name_list  = ''.join([a[0]+' , '+b[0] for a in A for b in B if a[1]==True and b[1]== True])
print("People in this image: "+ name_list)

Python Lists and List Manipulation, Use the SHIFT or CTRL key to select multiple items. The OPTION element. <​option value="item1" selected>Item 1</option>  A select list is a form element that allows the user to select one or more options from a range of options. Select lists are created using a combination of the HTML <select> and <option> tags. Select lists can be nested inside a <form> element or they can stand alone. They can also be associated with a form via the form attribute of the <select> tag. Basic Select List Example. Here's an example of an HTML select list:

You can also do this:

l1 = [('ELON_MUSK', True), ('BARACK_OBAMA', False), ('DONALD_TRUMP', False)]
l2 = [('ELON_MUSK', False), ('BARACK_OBAMA', True), ('DONALD_TRUMP', False)]

# join the two list
l1.extend(l2)

# create a simple function that return a list of true

f = lambda x: [i for i,j in x if j]

print('{} is not {}'.format(*f(l1)))

18 Most Common Python List Questions, When you select an item from a list in Windows, you typically click the selection with your mouse to highlight it and then choose an option to process your  For bigger comparison lists you may want to use some hash based collection. var compareSet = new HashSet<int>(lstCompare.Select(item => item.Number)); var lstFiltered = lstJobs .Where(job => compareSet.Contains(job.Number)) .ToList(); If the comparison condition is more complex or it is needed in several places, you should create a comparer class that implements IEqualityComparer<T>.

HTML Tags/Form Tags/selectable list, In order to select a random index, you can use Random.nextInt(int bound) method: ? 1. 2. 3. 4. Creating the Drop Down List in Excel. Here are the steps to create a drop-down list in Excel: Select the cell or range of cells where you want the drop-down list to appear (C2 in this example). Go to Data –> Data Tools –> Data Validation. In the Data Validation dialogue box, within the settings tab, select ‘List’ as Validation Criteria.

How Do I Select Multiple Items With Shift-Click?, select list item. Selects the item at the given index in the given list. The first list item is at index 1. After creating a drop-down list, right click at the sheet tab to select View Codefrom the context menu. 2. Then in the Microsoft Visual Basic for Applicationswindow, copy and paste below code to the blank script. VBA: Select multiple items from drop down list in a cell

Java, Sorted = true; // Set the SelectionMode to select multiple items. listBox1.​SelectionMode = SelectionMode.MultiExtended; // Select three initial items from the list. Apparently a Transactions instance can have multiple CreditorsDetails. So item.creditors.Select(m => m.CFirstName) will yield an enumeration of creditors names. You can try item.creditors.Select(m => m.CFirstName).FirstOrDefault(), but I suspect there is a flaw in your design.