一文看懂Python的控制结构：for、while、if…都有了

res = range(3)
print(list(res))

#输出：[0, 1, 2]

for i in range(3):
print(i)

'''输出：
0
1
2
'''

martial_arts = ["Sambo","Muay Thai","BJJ"]
for martial_art in martial_arts:
    print(f"{ martial_art} has influenced\
          modern mixed martial arts")

'''输出：
Sambo has influenced modern mixed martial arts
Muay Thai has influenced modern mixed martial arts
BJJ has influenced modern mixed martial arts
'''

def attacks():
    list_of_attacks = ["lower_body", "lower_body",
         "upper_body"]
    print("There are a total of {lenlist_of_attacks)}\
          attacks coming!")
    for attack in list_of_ attacks:
        yield attack
attack = attacks()
count = 0
while next(attack) == "lower_body":
    count +=1
    print(f"crossing legs to prevent attack #{count}")
else:
    count += 1
    print(f"This is not lower body attack, \
I will cross my arms for# count}")

'''输出：
There are a total of 3 attacks coming!
crossing legs to prevent attack #1
crossing legs to prevent attack #2
This is not a lower body attack, I will cross my arms for #3
'''

def recommended_attack(position):
    """Recommends an attack based on the position"""
    if position == "full_guard":
        print(f"Try an armbar attack")
    elif position == "half_guard":
        print(f"Try a kimura attack")
    elif position == "fu1l_mount":
        print(f"Try an arm triangle")
    else:
        print(f"You're on your own, \
         there is no suggestion for an attack")

recommended_attack("full_guard")#输出：Try an armbar attack

recommended_attack("z_guard")

#输出：You're on your own, there is no suggestion for an attack

 def lazy_return_random_attacks():
     """Yield attacks each time"""
     import random
     attacks = {"kimura": "upper_body",
            "straight_ankle_lock": "lower_body",
            "arm_triangle": "upper_body",
             "keylock": "upper_body",
             "knee_bar": "lower_body"}
     while True:
         random_attack random.choices(list(attacks.keys()))
         yield random attack

#Make all attacks appear as Upper Case
upper_case_attacks = \
         (attack.pop().upper() for attack in \
         lazy_return_random_attacks())

next(upper-case_attacks)

#输出：ARM-TRIANGLE

## Generator Pipeline: One expression chains into the next
#Make all attacks appear as Upper Case
upper-case_attacks =\
    (attack. pop().upper() for attack in\
    lazy_return_random_attacks())
#remove the underscore
remove underscore =\
    (attack.split("_")for attack in\
    upper-case_attacks)
#create a new phrase
new_attack_phrase =\
    (" ".join(phrase) for phrase in\
    remove_underscore)

next(new_attack_phrase)

#输出：'STRAIGHT ANKLE LOCK'

for number in range(10):
    print(next(new_attack_phrase))

'''输出：
KIMURA
KEYLOCK
STRAIGHT ANKLE LOCK
'''

martial_arts = ["Sambo", "Muay Thai", "BJJ"]
new_phrases [f"mixed Martial Arts is influenced by \
    (martial_art)" for martial_art in martial_arts]

print(new_phrases)
['Mixed Martial Arts is influenced by Sambo', \
'Mixed Martial Arts is influenced by Muay Thai', \
'Mixed Martial Arts is influenced by BJJ']

touch funclib/funcmod.py

"""This is a simple module"""
def list_of_belts_in_bjj():
    """Returns a list of the belts in Brazilian jiu-jitsu"""
    belts= ["white", "blue", "purple", "brown", "black"]
    return belts

import sys;sys.path.append("..")
from funclib import funcmod
funcmod.list_of_belts_in-bjj()

#输出：['white', 'blue', 'purple', 'brown', 'black']

pip install pandas

> ca requirements.txt
pylint
pytest
pytest-cov
click
jupyter
nbval

> pip install -r requirements.txt

"""This is a simple module"""

import pandas as pd

def list_of_belts_in_bjj():
    """Returns a list of the belts in Brazilian jiu-jitsu"""

    belts = ["white", "blue", "purple", "brown", "black"]
    return belts

def count_belts():
    """Uses Pandas to count number of belts"""

    belts = list_of_belts_in_bjj()
    df = pd.Dataframe(belts)
    res = df.count()
    count = res.values.tolist()[0]
    return count

from funclib.funcmod import count_belts

print(count_belts())

#输出：5

class Competitor: pass

class Competitor: pass

conor = Competitor()
conor.name = "Conor McGregor"
conor.age = 29
conor.weight = 155

nate = Competitor()
nate.name = "Nate Diaz"
nate.age = 30
nate.weight = 170

def print_competitor _age(object):
    """Print out age statistics about a competitor"""

    print(f"{object.name} is {object.age} years old")

print_competitor_age(nate)

#输出：Nate Diaz is 30 years old

print_competitor_age(conor)

#输出：Conor McGregor is 29 years old