无论我做啥，我都会在打印时遇到语法错误。这是下面的代码，我找不到问题所在

Posted 2023-03-11

【中文标题】无论我做啥，我都会在打印时遇到语法错误。这是下面的代码，我找不到问题所在

【英文标题】：Whatever I do, I get syntax error on print. Here is the code below, i can't find what is wrong无论我做什么，我都会在打印时遇到语法错误。这是下面的代码，我找不到问题所在

【发布时间】：2019-01-12 22:32:33

【问题描述】：

import csv
import numpy as np
import pandas as pd

# QUESTION 5; Only looking at the three most populous counties for each state, what are the three
# most populous states (in order of highest population to lowest population)?
# Use `CENSUS2010POP

census_df = pd.read_csv('census.csv')
census_df.head()

def question7():
    return "hllo"

def question8():

    c = census_df
    c = c[(c['REGION'] == 1) | (c['REGION'] == 2)] # region 1 or 2
    c = c.where(c['CTYNAME'].str.startswith('Washington')).dropna() # Washington name
    c = c[c['POPESTIMATE2015'] > c['POPESTIMATE2014']] #POP 15 > POP 14
    c = c.sort_index(ascending=True)
    print c[['STNAME', 'CTYNAME']


print (question7())

【问题讨论】：

如果您使用的是 Python 3，则无论您要打印什么，都需要用括号括起来。它不再是一个声明

What does "SyntaxError: Missing parentheses in call to 'print'" mean in Python?的可能重复

花药可能重复：Syntax error on print with Python 3

print(question7()) 那么应该在 Python 3 中工作......这应该是一个不同的问题......？

【参考方案1】：

线

    print c[['STNAME', 'CTYNAME']

缺少用于打印函数调用的括号。改成，

    print(c[['STNAME', 'CTYNAME'])

【参考方案2】：

您可以将以下代码用于三个最流行的县：

def answer_six():
  largest = census_df.nlargest(3, ['CENSUS2010POP']) 
  return largest[['STNAME', 'CTYNAME', 'CENSUS2010POP']]