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”from django.core.management import execute_from_command_line” – What should I do?
The cause: When Django is not installed on your PC, this issue arises. Solution: We should use pip to install Django to solve this issue. pip install django
The cause: When Django is not installed on your PC, this issue arises.
Solution: We should use pip to install Django to solve this issue.
”fatal python error: pythreadstate_get: no current thread” – How to fix?
The cause: If the .so file from homebrew's formula links against a different Python library than the interpreter you are using, this issue can arise. Solution: You can fix the issue by running your program using the python interpreter from homebrew (which should be located in /usr/local/bin/)
The cause: If the
.so
file from homebrew’s formula links against a differentPython
library than the interpreter you are using, this issue can arise.Solution: You can fix the issue by running your program using the python interpreter from homebrew (which should be located in
See less/usr/local/bin/
)The solution for ”error: java.lang.verifyerror: bad type on operand stack” ?
The cause: The issue arises because your lambda expression refers to a member of the outer this rather than this or a member of this. Had you written class B like public class B extends A { int innerData; public B() { super((data1, type) -> innerData = 1); } } the compiler rejected it since accesRead more
The cause: The issue arises because your lambda expression refers to a member of the outer
this
rather thanthis
or a member ofthis
. Had you written classB
likethe compiler rejected it since accessing
innerData
implies accessingthis
.Solution: The lambda expression refers to the outer instance without accessing the inner instance with the small change below, and no error occurs.
The solution for ”error: can’t get master address from zookeeper; znode data == null” error?
The cause: This error happens because Zookeeper won't stay live if the host computer or virtual machine is put to sleep. Solution: You can fix this error by starting Zookeeper and then run Hbase-shell: {HBASE_HOME}/bin/hbase-daemons.sh {start,stop} zookeeper Then you need to check this property in hRead more
The cause: This error happens because Zookeeper won’t stay live if the host computer or virtual machine is put to sleep.
Solution: You can fix this error by starting Zookeeper and then run Hbase-shell:
Then you need to check this property in hbase-env.sh:
How to deal with ”takes 2 positional arguments but 3 were given” error?
The cause: The reason is that all instance methods expect a first arg which by custom we call self. The correct declaration for a method is def method(self, arg):, not the def method(arg): his issue occurs when the method dispatch tries to call method(arg): and match up two parameters self, arg agaRead more
The cause: The reason is that all instance methods expect a first arg which by custom we call
self
. The correct declaration for a method isdef method(self, arg):
, not thedef method(arg):
his issue occurs when the method dispatch tries to callmethod(arg):
and match up two parametersself, arg
against it.Solution: You need to add
self
argument as the first argument to all defined methods in classes:After that, you can use your strategy based on your intuition:
What can I do with the ”uncaught referenceerror: angular is not defined” error?
The cause: This error appears because at the time your angular code runs, angular does not exist yet. Solution: Before accessing angular.module, you must have make it available by using <script src="lib/angular/angular.js"></script> after then you can call angular.module as the follRead more
The cause: This error appears because at the time your angular code runs,
angular
does not exist yet.Solution: Before accessing
angular.module
, you must have make it available by usingafter then you can call
angular.module
as the following:”warning: count(): parameter must be an array or an object that implements countable in” – How to fix?
The cause: This error is neither a fatal one or an internal server problem that prevents your website from loading, but rather a notice of a bug in the code of a specific file. It can be due to PHP version or upgrade issue. Solution: Addind this line is_array( $elements[‘pages’] ) && count(Read more
The cause: This error is neither a fatal one or an internal server problem that prevents your website from loading, but rather a notice of a bug in the code of a specific file. It can be due to PHP version or upgrade issue.
Solution: Addind this line is_array( $elements[‘pages’] ) && count( $elements[‘pages’] )
And the new code is:
Save the PHP file after replacing the previous line of code with the one from above.
How to resolve the error: ”warning: assignment from incompatible pointer type”?
The cause: This error occurs because you have a struct member of type struct myPage while you've defined a type called myPage Solution: You can fix the issue by making them the same type by changing the struct definition to: typedef struct myPage { int pageNum; } myPage; or you could just use myPageRead more
The cause: This error occurs because you have a struct member of type
struct myPage
while you’ve defined a type calledmyPage
Solution: You can fix the issue by making them the same type by changing the
struct
definition to:or you could just use
See lessmyPage *
instead ofstruct myPage *
.The way to fix the ”w/dynamitemodule: local module descriptor class for com.google.firebase.auth not found.” error?
The cause: This error happens perhaps because the Google Play services are not updated. Solution: There are 2 options to fix the problem: Option 1: Check to see if you are utilizing it in the Anonymous state by going to Firebase Console < Authentication < SIGN-IN METHOD. If you are, turn thatRead more
The cause: This error happens perhaps because the Google Play services are not updated.
Solution: There are 2 options to fix the problem:
Option 1: Check to see if you are utilizing it in the Anonymous state by going to Firebase Console < Authentication < SIGN-IN METHOD. If you are, turn that off and use your preferred login method, such as email and password.
Option 2: Verify that the testing device is using Google Play Services version 9.0.0 or later.
See lessSolve the ”uncaught typeerror: cannot set property ‘onclick’ of null” error?
The cause: The HTML will load synchronously by default, and the browser will read the entire HTML page. Because your javascript file (site.js) imported inside <head> tag. As a result, this file will read first and DOM is not ready and also does not contain btnLogin button. Solution: In the botRead more
The cause: The HTML will load synchronously by default, and the browser will read the entire HTML page.
Because your javascript file (
site.js
) imported inside <head> tag. As a result, this file will read first and DOM is not ready and also does not containbtnLogin
button.Solution: In the bottom of
<body>
tag, add thesite.js
file as the following: