Python check whether a list includes some value All In One

Python check whether a list includes some value All In One

list includes

error

#!/usr/bin/env python3
# coding: utf8

contacts = [
  ('James', 42),
  ('Amy', 24),
  ('John', 31),
  ('Amanda', 63),
  ('Bob', 18)
]

name = input()
names = []

for tp in contacts:
  # 构造 list keys
  if tp[0] == name:
    print(tp[0] + ' is ' + tp[1])
    # You are trying to concatenate a string and an integer. ❌
    # You will need to convert the integer to a string in order to concatenate it.

# python3 ./tuple.py Amanda
# python3 ./tuple.py xgqfrms

solutions

#!/usr/bin/env python3
# coding: utf8

contacts = [
  ('James', 42),
  ('Amy', 24),
  ('John', 31),
  ('Amanda', 63),
  ('Bob', 18)
]

name = input()
names = []

for tp in contacts:
  # 构造 list keys
  if tp[0] == name:
    # 类型转换 ✅
    print(tp[0] + ' is ' + str(tp[1]))

# python3 ./tuple.py Amanda
# python3 ./tuple.py xgqfrms

not in

#!/usr/bin/env python3
# coding: utf8

contacts = [
  ('James', 42),
  ('Amy', 24),
  ('John', 31),
  ('Amanda', 63),
  ('Bob', 18)
]

name = input()
names = []

for tp in contacts:
  # 构造 list keys
  names.append(tp[0])
  if tp[0] == name:
    # hack: print 类型分割 ✅
    print(tp[0] + ' is', tp[1])

# ✅
if name not in names:
  print("Not Found")

# python3 ./tuple.py Amanda
# python3 ./tuple.py xgqfrms

flag 🚀

#!/usr/bin/env python3
# coding: utf8

contacts = [
  ('James', 42),
  ('Amy', 24),
  ('John', 31),
  ('Amanda', 63),
  ('Bob', 18)
]

name = input()
flag = False

for tp in contacts:
  if tp[0] == name:
    flag = True
    print(tp[0] + ' is', tp[1])

# flag 🇨🇳
if not flag:
  print("Not Found")

# python3 ./tuple.py Amanda
# python3 ./tuple.py xgqfrms

any

#!/usr/bin/env python3
# coding: utf8

contacts = [
  ('James', 42),
  ('Amy', 24),
  ('John', 31),
  ('Amanda', 63),
  ('Bob', 18)
]

name = input()
names = []

for tp in contacts:
  # 构造 list keys
  names.append(tp[0])
  if tp[0] == name:
    print(tp[0] + ' is', tp[1])

# 🚀 https://flexiple.com/python/python-list-contains/
result = any(item in name for item in names)
if not result:
  print("Not Found")

# python3 ./tuple.py Amanda
# python3 ./tuple.py xgqfrms

https://www.runoob.com/python/python-func-any.html

demos

https://www.sololearn.com/learn/courses/python-intermediate/code-coach/912216124?returnUrl=/learn/courses/python-intermediate/lesson/912154709?p=3

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Python Tutorials

https://www.runoob.com/python3/python3-list.html

https://www.runoob.com/python3/python3-tuple.html

https://www.runoob.com/python3/python3-basic-operators.html

https://www.runoob.com/python3/python3-string.html

https://www.runoob.com/python3/python3-function.html

built-in-functions

https://www.runoob.com/python3/python3-built-in-functions.html

https://www.runoob.com/python/python-func-any.html

refs

https://flexiple.com/python/python-list-contains/

https://thispointer.com/python-how-to-check-if-an-item-exists-in-list-search-by-value-or-condition/

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