NtotheTC posted:

Does anyone know if pipenv can replicate the behaviour of vex? (https://pypi.python.org/pypi/vex) I've always found vex to be lightyears ahead of virtualenvwrapper for development (activating and deactivating virtualenvs manually is a horrible pattern) but I've never used pipenv and people seem very happy with it

To be clear, the behaviour I want to replicate is

Bash code:

vex myenv python myscript.py

instead of

Bash code:

workon myenv
python myscript.py
deactivate myenv

Linear Zoetrope posted:

However, your second version is preferred. Python (and most any programming language) will only evaluate the conditionals in order from first to last, so if it's testing if pr <= 2000 it's already executed and proven that it's not <= 999

Seventh Arrow posted:

The code cops are busting me with an "invalid syntax" error for the crime of trying to combine comparison operations in an if statement (I think):

code:

pr = [df["price"]]
cl = color
if pr <= 999:
    cl = 'green'
elif pr > 1000 and < 2000:
    cl = 'yellow'
elif pr > 2000 and < 3000:
    cl = 'orange'
else:
    cl = 'red'

The results from my googling efforts all had bad indentation of some sort, but I don't believe that's the case here - although I could be wrong.

Maybe the problem is trying to combine arithmetic operations on a single line? If so, I guess I could do it like this:

code:

pr = [df["price"]]
cl = color
if pr <= 999:
    cl = 'green'
elif pr <= 2000:
    cl = 'yellow'
elif pr <= 3000:
    cl = 'orange'
else:
    cl = 'red'

But this seems strange...if python sees that "pr" is less than 999 and also less than 2000, won't the universe collapse on itself or something?

Boris Galerkin posted:

I’m not sure how “correct” it is but I see and use this all the time. If pr <= 999 then the condition is met and nothing else will evaluate. If pr was not <= 999 then it moves onto the next condition, which is now implicitly “999 < pr <= 2000.

Seventh Arrow posted:

Ok I think I'm almost there. I've managed to twist its arm enough that it will post the map marker with a colour...once. So I think I'm in the ballpark, but I get a map with only one marker. Here's what I have so far:

code:

import pandas as pd
import folium

df = pd.read_excel('df_condo_v9_t1.xlsx', sheetname=0, header=0)

df.shape

df.dtypes

map_center = [df["Latitude"].mean(), df["Longitude"].mean()]

map_1 = folium.Map(location=map_center, tiles="Stamen Terrain", zoom_start=12)

class color:
    def out(self):
        print("successful.")

for i, row in df[["Latitude", "Longitude", "Price"]].dropna().iterrows():
    position = (row["Latitude"], row["Longitude"])
    pr = (row["Price"])
    cl = color
    if pr < 999:
        cl = 'green'
    elif pr < 2000:
        cl = 'yellow'
    elif pr < 3000:
        cl = 'orange'
    else:
        cl = 'red'
folium.Marker(position, icon=folium.Icon(color=cl)).add_to(map_1)

map_1

I think this could be due to one of two things:

A) The "dropna" and "iterrows" are working their magic with the "position" variable so that when the process gets around to "pr", almost all of the rows have been dropped. If this is true, then I don't know enough about python to properly address it.
B) It could be something folium-specific, since jupyter displays the following: <folium.map.Marker at 0x7efe9fd758d0>

_{Also, the "class color" thing is something I got off of Stack Overflow. If I don't put it in there, it says that "color is not defined."}

Seventh Arrow posted:

Seventh Arrow posted:

Ok that does indeed make sense, thanks. But I think classes or their objects do need to be defined I think, right? That what "def __init__" is for?

Actually, I think I'll just look up the python documentation and review some of this stuff since I'm not gonna get my book back any time soon.

quote:

{'title': 'Pale Green Things', 'lyrics': "\n\n[Verse 1]\nGot up before dawn\nWent down to the racetrack\nRiding with the windows down\nShortly after your first heart attack\nYou parked behind the paddock\nCracking asphalt underfoot\nComing up through the cracks\n\n[Chorus]\nPale green things\nPale green things\n\n[Verse 2]\nYou watched the horses run their workouts\nYou held your stopwatch in your left hand\nAnd a Racing Form beneath your arm\nCasting your gaze way out to no man's land\nSometimes I'll meet you out there\nLonely and frightened\nFlicking my tongue out at the wet leaves\n\n[Chorus]\nPale green things\nPale green things\n\n[Verse 3]\nMy sister called at 3 AM\nJust last December\nShe told me how you'd died at last\nAt last\nThat morning at the racetrack\nWas one thing that I remembered\nI turned it over in my mind\nLike a living Chinese finger trap\nSeaweed in Indiana sawgrass\n\n[Chorus]\nPale green things\nPale green things\n\n"}

quote:

{'title': 'Pale Green Things', 'lyrics': "\n\n\nGot up before dawn\nWent down to the racetrack\nRiding with the windows down\nShortly after your first heart attack\nYou parked behind the paddock\nCracking asphalt underfoot\nComing up through the cracks\n\n\nPale green things\nPale green things\n\n\nYou watched the horses run their workouts\nYou held your stopwatch in your left hand\nAnd a Racing Form beneath your arm\nCasting your gaze way out to no man's land\nSometimes I'll meet you out there\nLonely and frightened\nFlicking my tongue out at the wet leaves\n\n\nPale green things\nPale green things\n\n\nMy sister called at 3 AM\nJust last December\nShe told me how you'd died at last\nAt last\nThat morning at the racetrack\nWas one thing that I remembered\nI turned it over in my mind\nLike a living Chinese finger trap\nSeaweed in Indiana sawgrass\n\n\nPale green things\nPale green things\n\n"}

Dominoes posted:

map is a function that applies another function to all items of an iterable (such as a list).

fantastic in plastic posted:

I have an interview with a Python shop coming up and my background is in Ruby and JavaScript. The company told me to be prepared to demonstrate understanding of "lists, maps, and queues" in the interview and I want to sanity check that I have the right terminology. Am I correct in thinking that in Python, a list is the data structure that looks like [foo, bar, baz], a map is the data structure that looks like {"foo": "bar", "baz":"qux"} and a queue is implemented with collections.deque?

fantastic in plastic posted:

Okay, thanks. Is there anything more to it than meets the eye? It looks like I just do something like

code:

map(lambda x: x**2, [1, 2, 3])

and that's all there is to it.

Baronash posted:

Is there a good way to have the extra series added as columns, rather than additional rows?

fantastic in plastic posted:

Okay, thanks. Is there anything more to it than meets the eye? It looks like I just do something like

code:

map(lambda x: x**2, [1, 2, 3])

and that's all there is to it.

quote:

filename=('HeteroFreq2.txt'),
with open(filename,'a') as f:
print(pop.dvars().gen, file = f)

quote:

TypeError: expected str, bytes or os.PathLike object, not tuple