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author谭九鼎 <109224573@qq.com>2020-10-20 18:38:26 +0800
committerGitHub <noreply@github.com>2020-10-20 18:38:26 +0800
commitad92cb8d7651b2fb6cf0603ed8930e10f01e90dd (patch)
tree4304c0c8c1dfdfdf83fbf28a1728c74b0cbaf8e4
parent33cd1f57ef49f4ed0817e906b7579fcf33c253a1 (diff)
[python/en] some clean up, add a Modulo example
-rw-r--r--python.html.markdown18
1 files changed, 9 insertions, 9 deletions
diff --git a/python.html.markdown b/python.html.markdown
index 2fc266eb..1dfd7bc8 100644
--- a/python.html.markdown
+++ b/python.html.markdown
@@ -50,17 +50,19 @@ Note: This article applies to Python 3 specifically. Check out [here](http://lea
10.0 / 3 # => 3.3333333333333335
# Modulo operation
-7 % 3 # => 1
+7 % 3 # => 1
+# i % j have the same sign as j, unlike C
+-7 % 3 # => 2
# Exponentiation (x**y, x to the yth power)
2**3 # => 8
# Enforce precedence with parentheses
-1 + 3 * 2 # => 7
+1 + 3 * 2 # => 7
(1 + 3) * 2 # => 8
# Boolean values are primitives (Note: the capitalization)
-True # => True
+True # => True
False # => False
# negate with not
@@ -126,7 +128,7 @@ b == a # => True, a's and b's objects are equal
"This is a string."
'This is also a string.'
-# Strings can be added too! But try not to do this.
+# Strings can be added too
"Hello " + "world!" # => "Hello world!"
# String literals (but not variables) can be concatenated without using '+'
"Hello " "world!" # => "Hello world!"
@@ -140,10 +142,9 @@ len("This is a string") # => 16
# You can also format using f-strings or formatted string literals (in Python 3.6+)
name = "Reiko"
f"She said her name is {name}." # => "She said her name is Reiko"
-# You can basically put any Python statement inside the braces and it will be output in the string.
+# You can basically put any Python expression inside the braces and it will be output in the string.
f"{name} is {len(name)} characters long." # => "Reiko is 5 characters long."
-
# None is an object
None # => None
@@ -173,7 +174,6 @@ print("Hello, World", end="!") # => Hello, World!
# Simple way to get input data from console
input_string_var = input("Enter some data: ") # Returns the data as a string
-# Note: In earlier versions of Python, input() method was named as raw_input()
# There are no declarations, only assignments.
# Convention is to use lower_case_with_underscores
@@ -506,7 +506,7 @@ print(contents)
with open('myfile2.txt', "r+") as file:
contents = json.load(file) # reads a json object from a file
-print(contents)
+print(contents)
# print: {"aa": 12, "bb": 21}
@@ -919,7 +919,7 @@ class Batman(Superhero, Bat):
def __init__(self, *args, **kwargs):
# Typically to inherit attributes you have to call super:
- # super(Batman, self).__init__(*args, **kwargs)
+ # super(Batman, self).__init__(*args, **kwargs)
# However we are dealing with multiple inheritance here, and super()
# only works with the next base class in the MRO list.
# So instead we explicitly call __init__ for all ancestors.