Javascript Rounded To The Second Decimal Place

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How to round a value to two decimal places in Python ? That’s a very good question. Lucky for you, Python offers some functions that allow you to round numbers.

Rounding of numbers to two decimal places is common. Money only uses two decimal places; you don’t want to treat a monetary value with a third decimal place. Weights are often represented with two decimal places; the extra values ‚Äã‚Äãare for extra precision that is not needed in most cases.

In this guide, we explain how to round a number to two decimal places in Python. Let’s take a look at two code snippets to help you learn how to round numbers in your code.

Rounding off numbers using round ()

We need to write a program that calculates how much money each friend in a group of friends has to pay for dinner. It starts by asking the user to enter how much a meal costs and how many friends were there:

Then we calculate how much each friend has to pay for dinner. We assume that each friend should pay an equal amount, no matter what they ordered:

We converted both "meal_cost" and "friends" to a floating point number . Indeed, the input () method returns a string. You cannot do a calculation on a string value using Python mathematical operators.

Now let’s round this value to two decimal places. We use the round () method. The round () method. turns a value to the nearest integer or to the nearest decimal

We also print the amount each friend must contribute to the console dinner:

We used the built-in round () to round the value of "cost_per_friend" to two decimal places. Next, we used the string concatenation to create a message to print to the console. This post teaches us how much each friend has to pay for their dinner

Run our code to see our working function .

If we had divided 64.92 by six without rounding the number, we would have seen a number with multiple decimal places. Our code calculates that each friend owes pay $ 10.82 for dinner by rounding the of our division sum to two decimal places. <

h2> Round off numbers using the string formatting

In our last example, we showed the rounded number in a string. There is another way to round a number if its only purpose is to be displayed in a string. This method is only supported in Python 3.x.

Let’s revise our code to round off the value each friend has to pay for dinner using the .format () syntax of formatting strings .

Let’s start by calculating how much each friend has to pay:

Then , write a print () statement that tells us how much each friend has to pay for dinner. We use a .format () instruction with the print () instruction. This allows us to format the values within our string:

Our .format () statement uses the following syntax to create a decimal representation of a number rounded to two places:

A colon (: ) tells our code that we want to format a value. The zero is used to let Python know that we are dealing with a number that can be padded with zeros. The .2 tells Python to round our number to two decimal places. The "f" shows our value as a number

Let’s run our code and see what happens:

Our code successfully calculates how much each friend has to pay for dinner. The result is like our first code snippet. There are two decimal places that show our numeric data has been rounded to two decimal places.

This method is more efficient than our first code snippet because all we want to do is print a value to the console. In this code, we haven’t used a round () statement.

If we were to use our rounded value further in our code, the string formatting syntax would not be practical

Conclusion

the most common approach . to round a value to two decimal places are:

The first method is valid for all cases where you need to round a number. The second method only works if you want to round a value to use in a string and if you are using Python 3.x.

You are now ready to round values ‚Äã‚Äãto two decimal places in your code like Python pro !

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Javascript Rounded To The Second Decimal Place around: Questions

Removing white space around a saved image in matplotlib

2 answers

I need to take an image and save it after some process. The figure looks fine when I display it, but after saving the figure, I got some white space around the saved image. I have tried the "tight" option for savefig method, did not work either. The code:

  import matplotlib.image as mpimg
  import matplotlib.pyplot as plt

  fig = plt.figure(1)
  img = mpimg.imread(path)
  plt.imshow(img)
  ax=fig.add_subplot(1,1,1)

  extent = ax.get_window_extent().transformed(fig.dpi_scale_trans.inverted())
  plt.savefig("1.png", bbox_inches=extent)

  plt.axis("off") 
  plt.show()

I am trying to draw a basic graph by using NetworkX on a figure and save it. I realized that without a graph it works, but when added a graph I get white space around the saved image;

import matplotlib.image as mpimg
import matplotlib.pyplot as plt
import networkx as nx

G = nx.Graph()
G.add_node(1)
G.add_node(2)
G.add_node(3)
G.add_edge(1,3)
G.add_edge(1,2)
pos = {1:[100,120], 2:[200,300], 3:[50,75]}

fig = plt.figure(1)
img = mpimg.imread("image.jpg")
plt.imshow(img)
ax=fig.add_subplot(1,1,1)

nx.draw(G, pos=pos)

extent = ax.get_window_extent().transformed(fig.dpi_scale_trans.inverted())
plt.savefig("1.png", bbox_inches = extent)

plt.axis("off") 
plt.show()
228

Answer #1

You can remove the white space padding by setting bbox_inches="tight" in savefig:

plt.savefig("test.png",bbox_inches="tight")

You"ll have to put the argument to bbox_inches as a string, perhaps this is why it didn"t work earlier for you.


Possible duplicates:

Matplotlib plots: removing axis, legends and white spaces

How to set the margins for a matplotlib figure?

Reduce left and right margins in matplotlib plot

228

Answer #2

I cannot claim I know exactly why or how my “solution” works, but this is what I had to do when I wanted to plot the outline of a couple of aerofoil sections — without white margins — to a PDF file. (Note that I used matplotlib inside an IPython notebook, with the -pylab flag.)

plt.gca().set_axis_off()
plt.subplots_adjust(top = 1, bottom = 0, right = 1, left = 0, 
            hspace = 0, wspace = 0)
plt.margins(0,0)
plt.gca().xaxis.set_major_locator(plt.NullLocator())
plt.gca().yaxis.set_major_locator(plt.NullLocator())
plt.savefig("filename.pdf", bbox_inches = "tight",
    pad_inches = 0)

I have tried to deactivate different parts of this, but this always lead to a white margin somewhere. You may even have modify this to keep fat lines near the limits of the figure from being shaved by the lack of margins.

cos

How do I install pip on macOS or OS X?

5 answers

I spent most of the day yesterday searching for a clear answer for installing pip (package manager for Python). I can"t find a good solution.

How do I install it?

1672

Answer #1

UPDATE (Jan 2019):

easy_install has been deprecated. Please use get-pip.py instead.


Old answer:

easy_install pip

If you need admin privileges to run this, try:

sudo easy_install pip

1672

Answer #2

⚡️ TL;DR — One line solution.

All you have to do is:

sudo easy_install pip

2019: ⚠️easy_install has been deprecated. Check Method #2 below for preferred installation!

Details:

⚡️ OK, I read the solutions given above, but here"s an EASY solution to install pip.

MacOS comes with Python installed. But to make sure that you have Python installed open the terminal and run the following command.

python --version

If this command returns a version number that means Python exists. Which also means that you already have access to easy_install considering you are using macOS/OSX.

ℹ️ Now, all you have to do is run the following command.

sudo easy_install pip

After that, pip will be installed and you"ll be able to use it for installing other packages.

Let me know if you have any problems installing pip this way.

Cheers!

P.S. I ended up blogging a post about it. QuickTip: How Do I Install pip on macOS or OS X?


✅ UPDATE (Jan 2019): METHOD #2: Two line solution —

easy_install has been deprecated. Please use get-pip.py instead.

First of all download the get-pip file

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

Now run this file to install pip

python get-pip.py

That should do it.

Another gif you said? Here ya go!

1672

Answer #3

You can install it through Homebrew on OS X. Why would you install Python with Homebrew?

The version of Python that ships with OS X is great for learning but it’s not good for development. The version shipped with OS X may be out of date from the official current Python release, which is considered the stable production version. (source)

Homebrew is something of a package manager for OS X. Find more details on the Homebrew page. Once Homebrew is installed, run the following to install the latest Python, Pip & Setuptools:

brew install python

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