不久前,我决定参加文字冒险游戏.我一直想这样做.但它第一次出现了史诗般的失败.这次我越来越近但不在那里.我想我看到了错误:问题是变量没有被带到下一个def.所以我想知道的是如何解决它?
这是描述问题的代码段:
def start():
print "Hello there Knight... Knight? Sir Knight, what's your name?"
name = raw_input("> ")
print "Well sir %s of simpleton. We have a message from the queen, do you want to read it?" % name
rm = raw_input("> ")
rm(rm)
def rm(rm):
if rm == "yes":
print "It says: \n Dear %s, \n Our kingdom is in great danger. Dragon Redpole has captured the beatiful princess. Who ever saves her rom his dangerous castle may marry …Run Code Online (Sandbox Code Playgroud) 我正在尝试使用 python 3.6 的新 f-string 功能在墙上编写自己的 99 瓶啤酒实现,但我被卡住了:
def ninety_nine_bottles():
for i in range(10, 0, -1):
return (f'{i} bottles of beer on the wall, {i} of beer! You take one down, pass it around, {} bottles of beer on the wall')
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如何减少最后一对括号中的“i”?我试过 i-=1 无济于事(语法错误)...
我在这里有一个非常独特的情况.我的字典有字符串键和pandas.DataFrame值:
d = {'0':df1,'1':df2,'2':df3,...,'1000':df1001}
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我想为df1,df2,df3等创建一个单独的csv文件,直到df1001,文件名为'0'.csv,'1'.csv,'2'.csv,依此类推,直到'1000'. csv分别.
我尝试过使用pandas to_csv,但这并没有帮助.有人可以帮帮我吗.
提前致谢.
我想了解两条代码行之间的区别。我找不到区别。每当我尝试运行第二个代码时,它都不会影响字符串a。
有人能告诉我为什么第二行代码不起作用吗?
a = "aaaaIstanbulaaaa".strip('a') #Affects the string
print(a)
>>>Istanbul
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a = "aaaaIstanbulaaaa" #Doesn't affect the string
a.strip('a')
print(a)
>>>aaaaIstanbulaaaa
Run Code Online (Sandbox Code Playgroud) 当我运行下面的代码时,我得到以下回溯:
\nTraceback (most recent call last):\n File "C:\\demo\\test.py", line 11, in <module>\n pdf.output("splintered.pdf")\n File "C:\\demo\\lib\\site-packages\\fpdf\\fpdf.py", line 1065, in output\n self.close()\n File "C:\\demo\\lib\\site-packages\\fpdf\\fpdf.py", line 246, in close\n self._enddoc()\n File "C:\\demo\\lib\\site-packages\\fpdf\\fpdf.py", line 1636, in _enddoc\n self._putpages()\n File "C:\\demo\\lib\\site-packages\\fpdf\\fpdf.py", line 1170, in _putpages\n p = self.pages[n].encode("latin1") if PY3K else self.pages[n]\nUnicodeEncodeError: \'latin-1\' codec can\'t encode character \'\\u2019\' in position 74: ordinal not in range(256)\nRun Code Online (Sandbox Code Playgroud)\n我该如何解决?是因为我选择了 Arial 作为字体吗?我想做的就是将 txt 转换为 pdf 文件,因此如果有任何更简单的方法可以在 Python 中执行此操作,我将不胜感激。
\nimport fpdf\npdf = fpdf.FPDF(format=\'letter\')\n\ntxt = \'bees and butterflies. …Run Code Online (Sandbox Code Playgroud) 我编写了一个函数,它迭代计算一些数量X,Y,返回最终结果。此外,此代码将每次迭代保存X,Y到文件中。这是基本结构:
def myFunc():
X,Y = 0,0
file1 = open(output1,"w")
file2 = open(output2,"w")
for i in range(1000):
X,Y = someCalculation(X,Y) #calculations happen here
file1.write(X)
file2.write(Y)
file1.close()
file2.close()
return X,Y
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但是,如果调用函数时省略文件名output1或,我需要此函数执行相同的计算,而不向相关文件添加任何内容。output2
这是我的凌乱的解决方案:
def myFunc(output1=None,output2=None):
X,Y = 0,0
if (output1 != None): file1 = open(output1,"w")
if (output2 != None): file2 = open(output2,"w")
for i in range(1000):
X,Y = someCalculation(X,Y) #calculations happen here
if (output1 != None): file1.write(X)
if (output2 != None): file2.write(Y)
if (output1 …Run Code Online (Sandbox Code Playgroud) 我想获取一个 csv 文件,对其进行排序,然后将其另存为 csv。这是我到目前为止所拥有的,不知道如何将其写入 csv 文件
import csv
with open('test.csv','r') as f:
sample = csv.reader(f)
sort = sorted(sample)
for eachline in sort:
print (eachline)
Run Code Online (Sandbox Code Playgroud) 我试图执行以下代码:
#include <iostream>
using namespace std;
int main()
{
int arr[4] = {1,2,3,4};
int *p;
p = arr;
cout << "p=" << p << endl;
char ch3[4] = {'c','d','e'};
char *ptr;
ptr = ch3;
cout << ptr << endl;
getchar();
return 0;
}
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当我打印指针p时,它打印存储在其中的数组'arr'的地址,而当我打印指针ptr时,它打印数组ch3而不是它的地址.我想知道为什么会这样.
这是我的代码,我的测试用例失败了:
["10","6","9","3","+","-11","*","/","*","17","+","5","+"]
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我打印了堆栈,堆栈如下所示:
[10]
[10, 6]
[10, 6, 9]
[10, 6, 9, 3]
[10, 6, 12]
[10, 6, 12, -11]
[10, 6, -132]
[10, -1] <-- ??
[-10]
[-10, 17]
[7]
[7, 5]
[12]
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当我们到达 -132, 6 时,它应该返回 0。不过不确定为什么它返回 -1,我尝试了其他它可以工作的编译器。所以我的问题是,发生了什么事?
def evalRPN(self, tokens):
setOfOperator = {'+', '*', '/', '-'}
def evaluate(x1, x2, operand):
if operand == "+":
return x1 + x2
elif operand == '-':
return x2 - x1 # Reverse order for subtraction
elif operand == '*':
return x1 …Run Code Online (Sandbox Code Playgroud)