python - Run multiline for loop in a single line - 


>>> query='';for var in xrange(9):\n\tquery+=str(var)   file "<stdin>", line 1     query='';for var in xrange(9):\n\tquery+=str(var)                ^ syntaxerror: invalid syntax   >>> query='';for var in xrange(9): query+=str(var)   file "<stdin>", line 1     query='';for var in xrange(9): query+=str(var)                ^ syntaxerror: invalid syntax

why wont above code work? following works

>>> query="" >>> var in xrange(9): query+=str(var) ...  >>> query '012345678' >>>

the ; allowed combine "small statements". expressions, print, , like. for loop, on other hand, compound statement. see full grammar specification:

simple_stmt: small_stmt (';' small_stmt)* [';'] newline small_stmt: (expr_stmt | print_stmt  | del_stmt | pass_stmt | flow_stmt |              import_stmt | global_stmt | exec_stmt | assert_stmt) ... compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated

in example, if more illustrate question, rewrite 

query = ''.join(str(var) var in xrange(9))

or if really need exec multiline statement, can add \n between assignment , for loop (as did in place):

>>> exec("query=''\nfor var in xrange(9):\n\tquery+=str(var)\nprint query") 012345678

but note work in exec, not in interactive shell directly:

>>> query=''\nfor var in xrange(9):\n\tquery+=str(var)\nprint query syntaxerror: unexpected character after line continuation character

Comments

Post a Comment

Popular posts from this blog

Magento/PHP - Get phones on all members in a customer group -

i working on custom magento extension. working around adminhtml part , i've created custom form there. here form code: <?php class vivasindustries_smsnotification_block_adminhtml_sms_sendmass_edit_form extends mage_adminhtml_block_widget_form { public function _preparelayout() { $extensionpath = mage::getmoduledir('js', 'vivasindustries_smsnotification'); $head = $this->getlayout()->getblock('head'); $head->addjs('jquery.js'); $head->addjs('vivas.js'); return parent::_preparelayout(); } protected function _prepareform() { $form = new varien_data_form(array( 'id' => 'edit_form', 'action' => $this->geturl('*/*/save', array('id' => $this->getrequest()->get...
Read more

php - Bypass Geo Redirect for specific directories -

i'm trying bypass redirect specific url within site. wondering if might able help. the code below code use, original urls replaces example.com i'd able access http://example.com/admin without redirect occuring. is there way this, , there way using own ip? function country_geo_redirect() { $country = getenv('http_geoip_country_code'); if ($country == "us" ) { wp_redirect("http://usa.example.com/"); exit; } else if ($country == "gb" ) { wp_redirect("http://uk.example.com/"); exit; } } add_action('init', 'country_geo_redirect'); you can bypass redirection code if server found ip address. if ip address == <my ip address> ' nothing here else country_georedirect() end if
Read more

php - .htaccess mod_rewrite for dynamic url which has domain names -

i want convert url ex:( example.com/link.php?url=facebook.com ) ( example.com/facebook.com.php ) how can using .htaccess. or there other process make job easier ? i tried adding script .htaccess file options +followsymlinks rewriteengine on rewriterule url-(.*)\.htm$ link.php?url=$1 but converting url adding "url-" ( example.com/url-facebook.com.php ) i want remove "url-" , want make ( example.com/facebook.com.php ) rewriteengine on rewritecond %{the_request} ^get.*link\.php\?url\= [nc] rewritecond %{request_uri} !/system/.* [nc] rewriterule (.*?)link\.php\?url\=/*(.*) /$1$2 [r=301,ne,l] not sure how above work edit of used use remove index.php url
Read more