Why is this if-clause not true when ${orderrowlist} contains data (it is a list of lists)?
${orderrowlist}= Run Keyword If '${orderrowlist}'== '${EMPTY}' Set variable ${tmp}
I log orderrowlist just before this if as well as directly after. The first logging list the expected data while at the second logging the content of orderrowlist is replaced with the content of tmp
Why does is this if-clause not true when ${orderrowlist} contains data (it is a list of lists)?
${orderrowlist}= Run Keyword If '${orderrowlist}'== '${EMPTY}' Set variable ${tmp}
Why is it false when the ${orderrowlist} is not empty? Because a non-empty list is not equal to an empty string.
The first logging list the expected data while at the second logging the content of orderrowlist is replaced with the content of tmp
That is because you are explicitly setting the value of the variable to the result of the keyword.
Normally, to set a variable based on a condition you should use Set variable if rather than Run keyword if. With the former you can provide two values: one if the condition is true and one if it is false. If you want the variable to be unchanged, you can use the existing value as the "false" value.
Here's an example:
*** Variables ***
${var} original value
*** Test Cases ***
Example
${var}= set variable if '${var}' == '${EMPTY}' new value ${var}
should be equal as strings ${var} original value
${var}= set variable if '${var}' == 'original value' new value ${var}
should be equal as strings ${var} new value
Related
So I'm trying to make a single line to check if a single element in Python list fits the criteria, but my current code will keep the loop going even if it hits a "True" -mark and thus only the last element counts for the check:
if [[CheckStatus(value, outsidevalue)] for value in valuelist] is True:
magic
(CheckStatus returns either True or False for every single value compared to outsidevalue and is supposed to accept is as true if a single value returns True)
that will always be false:
if [[CheckStatus(value, outsidevalue)] for value in valuelist] is True:
because you're comparing a list with a boolean.
What you want is any:
if any(CheckStatus(value, outsidevalue) for value in valuelist):
any iterates on the generator comprehension, calling your function on all elements until True is found (note that the inside square brackets have been removed, and we don't need to create a list comprehension, just a generator comprehension, which is faster)
I'm trying to return a value in Google sheets.
This is done using an Index Match as follows, which does work:
=iferror(index(Data!B:B, match(B5339,Data!G:G,0)),"Not Found")
I'd now like to expand this, so that if this first test fails, try looking up that same data in another sheet....
=iferror(if(index(Data!B:B, match(B5340,Data!G:G,0),if(index(HeadOfficeLeads!B:B, match(B5340,HeadOfficeLeads!A:A,0))))),"Not found")
This outputs the fail msg of "Not Found".
However, although the first test is indeed false, the second test is true (this second data set does in fact hold a match).
NB - the data containing this correct match on the 2nd sheet is created by a UNIQUE ( FILTER, FWIW....
For some reason, it doesnt look like the second IF statement is being run - and the whole thing doesnt work, giving the error "Wrong number of arguments".
I have a feeling the argument issue is that the first test doesnt have an "if false" clause - but believe the "IFERROR" parent should handle this?
If not, where would I put the "if false clause" for the IF's?
You don't need any if, because iferror already contains an if statement in its logic (as its name suggests). Here is an example of nested iferror statements, simplified for clarity:
=iferror(match("a", A1:A5, 0), iferror(match("a", B1:B5", 0), "not found"))
This will return the position of "a" in column A, if it's there; otherwise, it will return its position in column B if it's there, otherwise it returns "not found".
Works the same with index or anything else around match function.
I am trying to check if an entry is already in the database and add the entry if it isn't but the if statement never runs even though the condition is met.
userCurs.execute("SELECT EXISTS(SELECT 1 FROM images WHERE imageLink=?)", (image,))
exists = userCurs.fetchone()
if exists is None:
addImage(userName,image,'','')
else:
print '--------> image skipped'
print userCurs.fetchone()
I get this output:
--------> image skipped
None
--------> image skipped
None
and no entries are made to the database
The SQL statement:
SELECT EXISTS(SELECT 1 FROM images WHERE imageLink=?)
will always return a single row. The value of the column in that row will be the result of the EXISTS() function, which will be TRUE if any matches are found, or FALSE otherwise.
Since your original code only tested for the existence of a row in the result, and the full statement will always return exactly one row, you get the behavior you see.
What I think you should do is have your query return a rowset that has zero rows if no matches are found, and one (or more) rows if matches are found:
userCurs.execute("SELECT 1 FROM images WHERE imageLink=?", (image,))
Now your original test should work - if no imageLinks match the query, then there will be no rows in the result, so the first fetchone() will return a null object as you expect.
Of course, as several others have mentioned, you should ony call fetchone() once per row since it moves the cursor.
Solved it by changing the code to
userCurs.execute("SELECT EXISTS(SELECT 1 FROM images WHERE imageLink=?)", (image,))
exists = userCurs.fetchone()
if exists[0] == 0:
addImage(userName,image,'','')
else:
print '--------> image skipped'
print exists
As people have said the calling fetchone() twice gives different results the actual value of exists was (0,)
Don't call cursor.fetchone() again; the next row is always empty. Reuse the variable. You are fetching a (0,) or (1,) tuple; you could use tuple assignment to extract the flag value (note the comma on exits, =):
exists, = userCurs.fetchone()
if not exists:
addImage(userName, image, '', '')
else:
print '--------> image skipped'
print exists
Now exists will be set to 0 or 1, rather than (0,) or (1,) and the if not exists: test will not pass for the 0 case.
Okay, so I just recently got into lua and find myself stuck with the following:
I have the function peripheral.getNames() (which is a custom function)
it will return a table with the structure key,value, whereas key is always a number and starts from 1 and value will be what the function finds (it searches for devices connected to it)
In my example it creates a table which looks like this
1 herp
2 derp
3 monitor_1
4 morederp
I can print the values with the following
local pgn = peripherals.getNames()
for key,value in pairs(pgn) do
setCursorPos(1,key)
write(value)
end
end
this will output the corresponding value of the table at key on my display like this
herp
derp
monitor_1
morederp
now, I try to filter my results so it only prints something if value contains 'monitor'
I tried to achive this with
for key,value in pairs(pgn) do
if string.match(value, monitor) then
#dostuff
end
end
but it always returns 'bad argument: string expected, got nil'
so obviously string.match either does not accept 'value' or, value is not a string
so i tried converting value first
for key,value in pairs(pgn) do
value = tostring(value)
if ....
#dostuff
end
end
but it still throws the same error
Do any of you have an idea how i might either get string.match to accept 'value' or if there is another method to check the contents of 'value' for a pattern while in this for loop?
The error message is talking about the variable monitor, which is not defined and so has a nil value.
Try string.match(value, "monitor").
How would I do:
FinancialStatements.objects.get(statement_id=statement_id)
or SalesStatements.objects.get(statement_id=statement_id)
The result will always yield one result.
I ended up using the try/except route here:
try:
statement_object = FinancialStatements.objects.get(statement_id=statement_id)
except FinancialStatements.DoesNotExist:
statement_object = SalesStatements.objects.get(statement_id=statement_id)
Why not simply do:
result = (FinancialStatements.objects.filter(statement_id=statement_id) or
SalesStatements.objects.filter(statement_id=statement_id))
This should work, because filter returns a list - and an empty list if no entries match. An empty list evaluates to false in python's boolean logic, e.g. try running:
print [] or "hello"
(Just as a check, compare print ["Hi"] or "hello")
So, if the first query returns empty, the second will then be run. However, if the first matches anything, this will be result and the second query will be ignored.
Addendum: result will then be of a list type - you'll need to extract the (one and only) element with result[0].