if-statement

问题 The objective is to create a list comprehension that outputs two values. The for loops look like below paper_href_scopus = [] paper_title = [] for litag in all_td.find_all('a', {'class': 'ddmDocTitle'}): paper_href_scopus.append(litag['href']) paper_title.append(litag.text) As suggested by OP, this can be achieved by paper_href_scopus, paper_title = zip(*[(litag['href'], litag.text) for litag in all_td.find_all('a', {'class': 'ddmDocTitle'})]) However, there is an instances where the all_td

问题 I'm used to csh, so this is kinda irritating having to use bash. What is wrong with this code? if[$time > 0300] && [$time < 0900] then $mod=2 else $mod=0 fi 回答1: By standard it should be if [ "$time" -gt 300 ] && [ "$time" -lt 900 ] then mod=2 else mod=0 fi In normal shell scripts you use [ and ] to test values. There are no arithmetic-like comparison operators like > and < in [ ] , only -lt , -le , -gt , -ge , -eq and -ne . When you're in bash, [[ ]] is preferred since variables are not

问题 This script is supposed to: 1. Scroll down Column B where the Depts are located. 2. Next, select the entire Row of Data from Col A to Col F 3. Create a New Worksheet with the name of the Dept in Col B 4. Paste that Entire Row that was selected in the newly created worksheet 5. And then, move on to the Next Row until the End of the Data on the Original Data Sheet 6. If the Dept value is different from that of the previous row in Col B, then a New Worksheet is created and the routine begins

问题 This question already has answers here : Nested ifelse statement (9 answers) Closed 5 years ago . I want to create a new column D of data where: if column A is less than 5, then column D = column A if column A is = 5, then column D = 0 if column A is = 6, then column D = column B What would be the syntax? 回答1: You don't have to use ifelse df <- data.frame(a=1:6, b=rep("reproducible",6), c=rep("example",6), stringsAsFactors=F) df$d <- df$a df$d[df$a==5] <- 0 df$d[df$a==6] <- df$b[df$a==6] df #

问题 This question already has answers here : Nested ifelse statement (9 answers) Closed 5 years ago . I want to create a new column D of data where: if column A is less than 5, then column D = column A if column A is = 5, then column D = 0 if column A is = 6, then column D = column B What would be the syntax? 回答1: You don't have to use ifelse df <- data.frame(a=1:6, b=rep("reproducible",6), c=rep("example",6), stringsAsFactors=F) df$d <- df$a df$d[df$a==5] <- 0 df$d[df$a==6] <- df$b[df$a==6] df #

问题 Wondering if it's possible to finagle this logic (checking a variable for changes over time and running a loop while true) into a bash if statement or while loop condition. I was hoping for something like: var=$(du -h *flat*.vmdk) var2=$(sleep 1 ; du -h *flat*.vmdk) if [[ $var != $var2 ]]; then while true do echo -ne $(du -h *flat*.vmdk)\\r sleep 1 done else echo "Transfer complete" fi I've also played with a while loop , rather than an if then with no luck. while [ $var != $var2 ] ; do echo

问题 Wondering if it's possible to finagle this logic (checking a variable for changes over time and running a loop while true) into a bash if statement or while loop condition. I was hoping for something like: var=$(du -h *flat*.vmdk) var2=$(sleep 1 ; du -h *flat*.vmdk) if [[ $var != $var2 ]]; then while true do echo -ne $(du -h *flat*.vmdk)\\r sleep 1 done else echo "Transfer complete" fi I've also played with a while loop , rather than an if then with no luck. while [ $var != $var2 ] ; do echo

问题 I needed to search multiple cells for a specific value and when it is found it should be returned in new column. I got an answer here; Python: find string in multiple columns and return it in new column yet this line below return the first value found df['b'] = (df[cols].where(df[cols].stack().str.contains('b') .unstack(fill_value=False)).ffill(1).iloc[:,-1]) where cols df = df[['col1', 'col2', 'col3', 'col4']] I tried the other answers and they all gave me error ValueError: cannot reindex

问题 I want to make a decision in a Mulesoft flow, and have looked at the Choice Flow Control. My problem, is that I want to do something if the condition is true, and nothing if it is false, something like: if (condition == true) do some work or, in probably incorrect xml: <choice doc:name="call a subflow if the test is true"> <when expression="#[flowVars.someVariable == True]"> <flow-ref name="doSomething" doc:name="do another thing"/> </when> </choice> no else clause, and no default flow. How

问题 I want to make a decision in a Mulesoft flow, and have looked at the Choice Flow Control. My problem, is that I want to do something if the condition is true, and nothing if it is false, something like: if (condition == true) do some work or, in probably incorrect xml: <choice doc:name="call a subflow if the test is true"> <when expression="#[flowVars.someVariable == True]"> <flow-ref name="doSomething" doc:name="do another thing"/> </when> </choice> no else clause, and no default flow. How