foreach

Creating relations between countries in neo4j using python Question: I need help with creating relations between countries in neo4j using python. I have a code, but in neo4j browser it doesn’t create relations. from neo4j import GraphDatabase driver = GraphDatabase.driver("neo4j://localhost:7687", auth=("neo4j", "test")) def create_country(tx, name,continent,population_mln,govrm_system,bcountry): tx.run("CREATE (a:Country {name: $name,continent: $continent,population_mln: $population_mln,govrm_system:$govrm_system,bcountry: $bcountry})", name=name,continent=continent,population_mln=population_mln,govrm_system=govrm_system,bcountry=bcountry) with driver.session() …

Python foreach equivalent Question: I am diving into Python and I have a question about foreach iteration. I am new to Python and I have some experience in C#. So I am wondering, if there is some equivalent function in Python for iteration all over all items in my collection, e.g. pets = [‘cat’, ‘dog’, …

Python List & for-each access (Find/Replace in built-in list) Question: I originally thought Python was a pure pass-by-reference language. Coming from C/C++ I can’t help but think about memory management, and it’s hard to put it out of my head. So I’m trying to think of it from a Java perspective and think of everything …

In Python, is it better to use list comprehensions or for-each loops? Question: Which of the following is better to use and why? Method 1: for k, v in os.environ.items(): print “%s=%s” % (k, v) Method 2: print “n”.join([“%s=%s” % (k, v) for k,v in os.environ.items()]) I tend to lead towards the first as more …

Why does Python skip elements when I modify a list while iterating over it? Question: I’m currently developing a program in python and I just noticed that something was wrong with the foreach loop in the language, or maybe the list structure. I’ll just give a generic example of my problem to simplify, since I …